Slow syntax with package fontawesome5

[kiryph]

Description

When loading the fontawesome5 package in a LaTeX file, syntax highlighting becomes very slow (e.g. cursor becomes laggy in normal mode).

Use :syntime on and view full report with :redir > report.txt, :syntime report and :e report.txt.

Workaround in init.lua (neovim):

vim.g.vimtex_syntax_packages = {
  fontawesome5 = {load = 0},
}

:syntime report (first 200 of 1889 lines; github has 65536 characters limit)

  TOTAL      COUNT  MATCH   SLOWEST     AVERAGE   NAME               PATTERN
  0.010004   1452   0       0.000138    0.000007  texLigature        \v%(``|''|,,)
  0.006592   1452   0       0.000060    0.000005  texMathZoneLI      \%(\\\@<!\)\@<=\\(
  0.004050   1452   0       0.000105    0.000003  texCmdFontawesome  \v\\faImage>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{image\}
  0.004032   1452   0       0.000099    0.000003  texCmdFontawesome  \v\\faSalesforce>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{salesforce\}
  0.003987   1452   0       0.000100    0.000003  texCmdFontawesome  \v\\faFilm>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{film\}
  0.003984   1452   0       0.000133    0.000003  texCmdFontawesome  \v\\faUserShield>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{user-shield\
  0.003976   1452   0       0.000099    0.000003  texCmdFontawesome  \v\\faStripeS>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{stripe-s\}
  0.003960   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faSortAmountUp\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{sort-amount-up\}
  0.003958   1452   0       0.000061    0.000003  texCmdFontawesome  \v\\faCompress>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{compress\}
  0.003956   1667   685     0.000141    0.000002  texComment         %.*$
  0.003944   1452   0       0.000103    0.000003  texCmdFontawesome  \v\\faGooglePlus>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{google-plus\
  0.003919   1452   0       0.000062    0.000003  texCmdFontawesome  \v\\faHandshakeSlash>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{handshak
  0.003917   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faBabyCarriage>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{baby-carri
  0.003914   1452   0       0.000050    0.000003  texCmdFontawesome  \v\\faCalendar>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{calendar\}
  0.003908   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faPray>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{pray\}
  0.003891   1452   0       0.000054    0.000003  texCmdFontawesome  \v\\faSellsy>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{sellsy\}
  0.003891   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faRedditSquare>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{reddit-squ
  0.003890   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faCloudsmith>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{cloudsmith\}
  0.003886   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faCoffee>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{coffee\}
  0.003885   1452   0       0.000105    0.000003  texCmdFontawesome  \v\\faProductHunt>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{product-hun
  0.003877   1452   0       0.000094    0.000003  texCmdFontawesome  \v\\faFileImage>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{file-image\}
  0.003874   1452   0       0.000105    0.000003  texCmdFontawesome  \v\\faOpenid>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{openid\}
  0.003874   1452   0       0.000042    0.000003  texCmdFontawesome  \v\\faLaughBeam>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{laugh-beam\}
  0.003864   1452   0       0.000099    0.000003  texCmdFontawesome  \v\\faEllipsisH>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{ellipsis-h\}
  0.003863   1452   0       0.000049    0.000003  texCmdFontawesome  \v\\faPrescriptionBottle>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{pres
  0.003859   1452   0       0.000105    0.000003  texCmdFontawesome  \v\\faChild>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{child\}
  0.003857   1452   0       0.000097    0.000003  texCmdFontawesome  \v\\faThumbsDown>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{thumbs-down\
  0.003856   1452   0       0.000056    0.000003  texCmdFontawesome  \v\\faSortNumericDown\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{sort-numeric-dow
  0.003849   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faCaretLeft>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{caret-left\}
  0.003847   1452   0       0.000093    0.000003  texCmdFontawesome  \v\\faGavel>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{gavel\}
  0.003845   1452   0       0.000099    0.000003  texCmdFontawesome  \v\\faCrutch>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{crutch\}
  0.003843   1452   0       0.000042    0.000003  texCmdFontawesome  \v\\faIcicles>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{icicles\}
  0.003838   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faGoogleWallet>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{google-wal
  0.003837   1452   0       0.000040    0.000003  texCmdFontawesome  \v\\faRaspberryPi>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{raspberry-p
  0.003834   1452   0       0.000058    0.000003  texCmdFontawesome  \v\\faFrog>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{frog\}
  0.003833   1452   0       0.000097    0.000003  texCmdFontawesome  \v\\faCcPaypal>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{cc-paypal\}
  0.003828   1452   0       0.000056    0.000003  texCmdFontawesome  \v\\faPiedPiperHat>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{pied-piper
  0.003823   1452   0       0.000100    0.000003  texCmdFontawesome  \v\\faFulcrum>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{fulcrum\}
  0.003821   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faMicroblog>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{microblog\}
  0.003820   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faLiraSign>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{lira-sign\}
  0.003817   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faTradeFederation>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{trade-f
  0.003814   1452   0       0.000061    0.000003  texCmdFontawesome  \v\\faForumbee>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{forumbee\}
  0.003813   1452   0       0.000082    0.000003  texCmdFontawesome  \v\\faCalculator>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{calculator\}
  0.003812   1452   0       0.000043    0.000003  texCmdFontawesome  \v\\faBroadcastTower>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{broadcas
  0.003812   1452   0       0.000046    0.000003  texCmdFontawesome  \v\\faSkiing>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{skiing\}
  0.003809   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faRssSquare>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{rss-square\}
  0.003806   1452   0       0.000101    0.000003  texCmdFontawesome  \v\\faDollyFlatbed>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{dolly-flat
  0.003805   1452   0       0.000086    0.000003  texCmdFontawesome  \v\\faHourglass>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{hourglass\}
  0.003804   1452   0       0.000064    0.000003  texCmdFontawesome  \v\\faChessKnight>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{chess-knigh
  0.003803   1452   0       0.000096    0.000003  texCmdFontawesome  \v\\faMapSigns>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{map-signs\}
  0.003799   1452   0       0.000089    0.000003  texCmdFontawesome  \v\\faAppStore>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{app-store\}
  0.003799   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faYandex>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{yandex\}
  0.003797   1452   0       0.000073    0.000003  texCmdFontawesome  \v\\faBox>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{box\}
  0.003797   1452   0       0.000073    0.000003  texCmdFontawesome  \v\\faIoxhost>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{ioxhost\}
  0.003795   1452   0       0.000096    0.000003  texCmdFontawesome  \v\\faUserCheck>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{user-check\}
  0.003795   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faInternetExplorer>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{intern
  0.003794   1452   0       0.000064    0.000003  texCmdFontawesome  \v\\faHippo>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{hippo\}
  0.003794   1452   0       0.000066    0.000003  texCmdFontawesome  \v\\faChartArea>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{chart-area\}
  0.003790   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faBezierCurve>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{bezier-curv
  0.003786   1452   0       0.000057    0.000003  texCmdFontawesome  \v\\faGrinTongue>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{grin-tongue\
  0.003782   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faFigma>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{figma\}
  0.003781   1452   0       0.000061    0.000003  texCmdFontawesome  \v\\faJsSquare>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{js-square\}
  0.003781   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faUmbrella>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{umbrella\}
  0.003778   1452   0       0.000064    0.000003  texCmdFontawesome  \v\\faUndo\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{undo\}
  0.003773   1452   0       0.000056    0.000003  texCmdFontawesome  \v\\faTractor>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{tractor\}
  0.003773   1452   0       0.000054    0.000003  texCmdFontawesome  \v\\faPepperHot>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{pepper-hot\}
  0.003773   1452   0       0.000051    0.000003  texCmdFontawesome  \v\\faVirusSlash>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{virus-slash\
  0.003771   1452   0       0.000081    0.000003  texCmdFontawesome  \v\\faNutritionix>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{nutritionix
  0.003770   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faStudiovinari>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{studiovina
  0.003768   1452   0       0.000059    0.000003  texCmdFontawesome  \v\\faWpexplorer>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{wpexplorer\}
  0.003768   1452   0       0.000105    0.000003  texCmdFontawesome  \v\\faDemocrat>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{democrat\}
  0.003766   1452   0       0.000069    0.000003  texCmdFontawesome  \v\\faUserInjured>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{user-injure
  0.003765   1452   0       0.000100    0.000003  texCmdFontawesome  \v\\faTextHeight>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{text-height\
  0.003765   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faYarn>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{yarn\}
  0.003764   1452   0       0.000089    0.000003  texCmdFontawesome  \v\\faAlignCenter>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{align-cente
  0.003763   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faOptinMonster>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{optin-mons
  0.003759   1452   0       0.000056    0.000003  texCmdFontawesome  \v\\faKey>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{key\}
  0.003758   1452   0       0.000100    0.000003  texCmdFontawesome  \v\\faCalendarCheck>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{calendar-
  0.003756   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faDiceThree>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{dice-three\}
  0.003755   1452   0       0.000039    0.000003  texCmdFontawesome  \v\\faToriiGate>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{torii-gate\}
  0.003755   1452   0       0.000056    0.000003  texCmdFontawesome  \v\\faWeightHanging>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{weight-ha
  0.003753   1452   0       0.000103    0.000003  texCmdFontawesome  \v\\faBluetooth>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{bluetooth\}
  0.003751   1452   0       0.000046    0.000003  texCmdFontawesome  \v\\faSmile>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{smile\}
  0.003747   1452   0       0.000040    0.000003  texCmdFontawesome  \v\\faBicycle>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{bicycle\}
  0.003742   1452   0       0.000054    0.000003  texCmdFontawesome  \v\\faEuroSign>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{euro-sign\}
  0.003742   1452   0       0.000055    0.000003  texCmdFontawesome  \v\\faGithub\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{github\}
  0.003742   1452   0       0.000105    0.000003  texCmdFontawesome  \v\\faPauseCircle>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{pause-circl
  0.003740   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faShoePrints>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{shoe-prints\
  0.003739   1452   0       0.000059    0.000003  texCmdFontawesome  \v\\faHeadset>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{headset\}
  0.003739   1452   0       0.000099    0.000003  texCmdFontawesome  \v\\faConciergeBell>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{concierge
  0.003737   1452   0       0.000130    0.000003  texCmdFontawesome  \v\\faFacebookF>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{facebook-f\}
  0.003736   1452   0       0.000099    0.000003  texCmdFontawesome  \v\\faPhoenixFramework>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{phoeni
  0.003734   1452   0       0.000100    0.000003  texCmdFontawesome  \v\\faTwitch>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{twitch\}
  0.003732   1452   0       0.000097    0.000003  texCmdFontawesome  \v\\faDeploydog>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{deploydog\}
  0.003731   1452   0       0.000074    0.000003  texCmdFontawesome  \v\\faHouzz>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{houzz\}
  0.003731   1452   0       0.000066    0.000003  texCmdFontawesome  \v\\faEdgeLegacy>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{edge-legacy\
  0.003729   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faSignOut\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{sign-out\}
  0.003728   1452   0       0.000095    0.000003  texCmdFontawesome  \v\\faFileSignature>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{file-sign
  0.003728   1452   0       0.000046    0.000003  texCmdFontawesome  \v\\faCartPlus>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{cart-plus\}
  0.003728   1452   0       0.000054    0.000003  texCmdFontawesome  \v\\faMonero>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{monero\}
  0.003724   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faVolumeOff>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{volume-off\}
  0.003724   1452   0       0.000085    0.000003  texCmdFontawesome  \v\\faCoins>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{coins\}
  0.003723   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faSplotch>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{splotch\}
  0.003720   1452   0       0.000068    0.000003  texCmdFontawesome  \v\\faAviato>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{aviato\}
  0.003717   1452   0       0.000092    0.000003  texCmdFontawesome  \v\\faFighterJet>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{fighter-jet\
  0.003715   1452   0       0.000097    0.000003  texCmdFontawesome  \v\\faEnvira>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{envira\}
  0.003714   1452   0       0.000061    0.000003  texCmdFontawesome  \v\\faAngleDoubleDown>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{angle-d
  0.003714   1452   0       0.000055    0.000003  texCmdFontawesome  \v\\faPhone>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{phone\}
  0.003712   1452   0       0.000054    0.000003  texCmdFontawesome  \v\\faBellSlash>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{bell-slash\}
  0.003712   1452   0       0.000073    0.000003  texCmdFontawesome  \v\\faArchway>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{archway\}
  0.003708   1452   0       0.000043    0.000003  texCmdFontawesome  \v\\faImages>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{images\}
  0.003706   1452   0       0.000066    0.000003  texCmdFontawesome  \v\\faLifeRing>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{life-ring\}
  0.003705   1452   0       0.000067    0.000003  texCmdFontawesome  \v\\faCss3\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{css3\}
  0.003705   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faThemeco>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{themeco\}
  0.003704   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faObjectGroup>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{object-grou
  0.003701   1452   0       0.000064    0.000003  texCmdFontawesome  \v\\faRenren>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{renren\}
  0.003699   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faChessQueen>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{chess-queen\
  0.003699   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faSquareFull>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{square-full\
  0.003698   1452   0       0.000046    0.000003  texCmdFontawesome  \v\\faTaxi>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{taxi\}
  0.003696   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faFileContract>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{file-contr
  0.003692   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faChessKing>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{chess-king\}
  0.003692   1452   0       0.000076    0.000003  texCmdFontawesome  \v\\faBatteryThreeQuarters>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{ba
  0.003691   1452   0       0.000041    0.000003  texCmdFontawesome  \v\\faGg>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{gg\}
  0.003690   1452   0       0.000067    0.000003  texCmdFontawesome  \v\\faHeadSideVirus>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{head-side
  0.003689   1452   0       0.000038    0.000003  texCmdFontawesome  \v\\faMercury>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{mercury\}
  0.003689   1452   0       0.000100    0.000003  texCmdFontawesome  \v\\faFileImport>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{file-import\
  0.003689   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faPoop>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{poop\}
  0.003689   1452   0       0.000068    0.000003  texCmdFontawesome  \v\\faMarsDouble>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{mars-double\
  0.003679   1452   0       0.000061    0.000003  texCmdFontawesome  \v\\faCcAmazonPay>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{cc-amazon-p
  0.003679   1452   0       0.000044    0.000003  texCmdFontawesome  \v\\faGit>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{git\}
  0.003677   1452   0       0.000050    0.000003  texCmdFontawesome  \v\\faList>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{list\}
  0.003677   1452   0       0.000064    0.000003  texCmdFontawesome  \v\\faFrownOpen>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{frown-open\}
  0.003676   1452   0       0.000056    0.000003  texCmdFontawesome  \v\\faSoundcloud>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{soundcloud\}
  0.003673   1452   0       0.000059    0.000003  texCmdFontawesome  \v\\faGrinWink>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{grin-wink\}
  0.003672   1452   0       0.000065    0.000003  texCmdFontawesome  \v\\faFastBackward>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{fast-backw
  0.003668   1452   0       0.000059    0.000003  texCmdFontawesome  \v\\faAngleDoubleRight>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{angle-
  0.003666   1452   0       0.000058    0.000003  texCmdFontawesome  \v\\faMailchimp>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{mailchimp\}
  0.003665   1452   0       0.000043    0.000003  texCmdFontawesome  \v\\faBlind>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{blind\}
  0.003661   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faAngrycreative>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{angrycrea
  0.003660   1452   0       0.000059    0.000003  texCmdFontawesome  \v\\faWatchmanMonitoring>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{watc
  0.003654   1452   0       0.000068    0.000003  texCmdFontawesome  \v\\faSuperscript>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{superscript
  0.003651   1452   0       0.000098    0.000003  texCmdFontawesome  \v\\faReadme>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{readme\}
  0.003650   1452   0       0.000046    0.000003  texCmdFontawesome  \v\\faCalendarWeek>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{calendar-w
  0.003646   1452   0       0.000053    0.000003  texCmdFontawesome  \v\\faCreativeCommonsNcJp>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{cre
  0.003645   1452   0       0.000042    0.000003  texCmdFontawesome  \v\\faMouse>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{mouse\}
  0.003644   1452   0       0.000063    0.000003  texCmdFontawesome  \v\\faSortAlphaDown\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{sort-alpha-down\}
  0.003643   1452   0       0.000060    0.000003  texCmdFontawesome  \v\\faUserTag>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{user-tag\}
  0.003643   1452   0       0.000038    0.000003  texCmdFontawesome  \v\\faRss>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{rss\}
  0.003641   1452   0       0.000054    0.000003  texCmdFontawesome  \v\\faXing>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{xing\}
  0.003638   1452   0       0.000062    0.000003  texCmdFontawesome  \v\\faHireAHelper>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{hire-a-help
  0.003638   1452   0       0.000049    0.000003  texCmdFontawesome  \v\\faArrowCircleUp>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{arrow-cir
  0.003637   1452   0       0.000062    0.000003  texCmdFontawesome  \v\\faStrava>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{strava\}
  0.003635   1452   0       0.000054    0.000003  texCmdFontawesome  \v\\faPause>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{pause\}
  0.003633   1452   0       0.000048    0.000003  texCmdFontawesome  \v\\faMapMarked>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{map-marked\}
  0.003632   1452   0       0.000043    0.000003  texCmdFontawesome  \v\\faMemory>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{memory\}
  0.003629   1452   0       0.000073    0.000002  texCmdFontawesome  \v\\faToiletPaperSlash>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{toilet
  0.003628   1452   0       0.000059    0.000002  texCmdFontawesome  \v\\faCcStripe>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{cc-stripe\}
  0.003626   1452   0       0.000043    0.000002  texCmdFontawesome  \v\\faBowlingBall>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{bowling-bal
  0.003618   1452   0       0.000064    0.000002  texCmdFontawesome  \v\\faShuttleVan>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{shuttle-van\
  0.003616   1452   0       0.000043    0.000002  texCmdFontawesome  \v\\faMicrophone>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{microphone\}
  0.003614   1452   0       0.000100    0.000002  texCmdFontawesome  \v\\faLeaf>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{leaf\}
  0.003610   1452   0       0.000064    0.000002  texCmdFontawesome  \v\\faHooli>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{hooli\}
  0.003610   1452   0       0.000057    0.000002  texCmdFontawesome  \v\\faCloudSunRain>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{cloud-sun-
  0.003609   1452   0       0.000061    0.000002  texCmdFontawesome  \v\\faJedi>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{jedi\}
  0.003609   1452   0       0.000093    0.000002  texCmdFontawesome  \v\\faSortAmountDown>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{sort-amo
  0.003607   1452   0       0.000117    0.000002  texCmdFontawesome  \v\\faSortAlphaUp\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{sort-alpha-up\}
  0.003604   1452   0       0.000040    0.000002  texCmdFontawesome  \v\\faBehanceSquare>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{behance-s
  0.003604   1452   0       0.000053    0.000002  texCmdFontawesome  \v\\faPython>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{python\}
  0.003602   1452   0       0.000059    0.000002  texCmdFontawesome  \v\\faUserClock>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{user-clock\}
  0.003599   1452   0       0.000062    0.000002  texCmdFontawesome  \v\\faVoicemail>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{voicemail\}
  0.003598   1452   0       0.000059    0.000002  texCmdFontawesome  \v\\faStickyNote>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{sticky-note\
  0.003595   1452   0       0.000044    0.000002  texCmdFontawesome  \v\\faStripe>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{stripe\}
  0.003594   1452   0       0.000042    0.000002  texCmdFontawesome  \v\\faCopy>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{copy\}
  0.003591   1452   0       0.000041    0.000002  texCmdFontawesome  \v\\faBlackberry>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{blackberry\}
  0.003591   1452   0       0.000045    0.000002  texCmdFontawesome  \v\\faFile>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{file\}
  0.003590   1452   0       0.000061    0.000002  texCmdFontawesome  \v\\faCreativeCommonsPd>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{creat
  0.003587   1452   0       0.000043    0.000002  texCmdFontawesome  \v\\faWaveSquare>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{wave-square\
  0.003582   1452   0       0.000060    0.000002  texCmdFontawesome  \v\\faFistRaised>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{fist-raised\
  0.003582   1452   0       0.000041    0.000002  texCmdFontawesome  \v\\faLuggageCart>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{luggage-car
  0.003581   1452   0       0.000103    0.000002  texCmdFontawesome  \v\\faDungeon>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{dungeon\}
  0.003578   1452   0       0.000038    0.000002  texCmdFontawesome  \v\\faDiagnoses>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{diagnoses\}
  0.003578   1452   0       0.000054    0.000002  texCmdFontawesome  \v\\faHospital>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{hospital\}
  0.003577   1452   0       0.000095    0.000002  texCmdFontawesome  \v\\faPlaystation>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{playstation
  0.003577   1452   0       0.000061    0.000002  texCmdFontawesome  \v\\faHryvnia>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{hryvnia\}
  0.003577   1452   0       0.000062    0.000002  texCmdFontawesome  \v\\faCreativeCommonsPd\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{creative-commo
  0.003575   1452   0       0.000087    0.000002  texCmdFontawesome  \v\\faRoute>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{route\}
  0.003573   1452   0       0.000040    0.000002  texCmdFontawesome  \v\\faPaypal>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{paypal\}
  0.003573   1452   0       0.000074    0.000002  texCmdFontawesome  \v\\faConnectdevelop>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{connectd
  0.003573   1452   0       0.000101    0.000002  texCmdFontawesome  \v\\faStarHalf\*|\\faIcon\*\s*%(\[%(regular|solid)])?\s*\{star-half\}
  0.003568   1452   0       0.000036    0.000002  texCmdFontawesome  \v\\faAngleRight>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{angle-right\
  0.003565   1452   0       0.000040    0.000002  texCmdFontawesome  \v\\faDirections>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{directions\}
  0.003564   1452   0       0.000029    0.000002  texCmdFontawesome  \v\\faVolleyballBall>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{volleyba
  0.003561   1452   0       0.000063    0.000002  texCmdFontawesome  \v\\faArchive>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{archive\}
  0.003561   1452   0       0.000053    0.000002  texCmdFontawesome  \v\\faUsb>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{usb\}
  0.003560   1452   0       0.000054    0.000002  texCmdFontawesome  \v\\faUserPlus>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{user-plus\}
  0.003560   1452   0       0.000063    0.000002  texCmdFontawesome  \v\\faYoast>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{yoast\}
  0.003558   1452   0       0.000061    0.000002  texCmdFontawesome  \v\\faXRay>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{x-ray\}
  0.003542   1452   0       0.000086    0.000002  texCmdFontawesome  \v\\faStop>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{stop\}
  0.003536   1452   0       0.000044    0.000002  texCmdFontawesome  \v\\faDumbbell>\ze%([^*]|$)|\\faIcon\s*%(\[%(regular|solid)])?\s*\{dumbbell\}

Download full report:
syntime.txt

Do you use a latexmkrc file?

no

VimtexInfo

System info:
  OS: macOS 12.6.1 (21G217)
  Vim version: NVIM v0.8.1
  Has clientserver: true
  Servername: /var/folders/2z/bljkcy1j2cbf7l9zf3dk0nqc0000gn/T/vimr_5E46FE94-9C53-4AF3-A633-BAA3BE4F79AE.sock

VimTeX project: pgfgantt-fontawesome5-milestones
  base: pgfgantt-fontawesome5-milestones.tex
  root: /Users/kiryph/Documents/pgfgantt-fontawesome5-milestones
  tex: /Users/kiryph/Documents/pgfgantt-fontawesome5-milestones/pgfgantt-fontawesome5-milestones.tex
  main parser: fallback current file
  document class: standalone
  packages: epstopdf-base expl3 fontawesome5 fontawesome5-generic-helper graphics graphicx ifluatex iftex ifthen keyval l3keys2e pgf pgfcalendar pgfcomp-version-0-65 pgfcomp-version-1-18 pgfcore pgffor pgfgantt pgfkeys pgfmath pgfplots pgfrcs pgfsys preview shellesc tikz tikz-dimline trig xcolor xkeyval xparse
  compiler: latexmk
    engine: -pdf
    options:
      -verbose
      -file-line-error
      -synctex=1
      -interaction=nonstopmode
    callback: 1
    continuous: 1
    executable: latexmk
  viewer: sioyek
  qf method: LaTeX logfile

Probably related issue

Conceal fontawesome5 (#2506)

[lervag]

I guess the solution here is to keep this package deactivate by default. I'm curious, though: do you use the conceal feature?

[kiryph]

do you use the conceal feature?

Currently not. However, I occasionally use conceal for equations.

I have noticed an issue when enabling the conceal feature with :set conceallevel=1. The fontawesome symbol is not visible and even a too large part of the text is completely hidden.

Consider this MWE:

\documentclass[margin=1cm]{standalone}
\usepackage{pgfgantt}
\usepackage{fontawesome5}

\newganttchartelement*{checkin}{
  checkin/.style={font={\faSignIn*}}
}

\newganttchartelement*{checkout}{
  checkout/.style={font={\faSignOut*}}
}

\begin{document}

hello \faImage

  \begin{ganttchart}{1}{12}
    \gantttitle{2022}{12} \\
    \gantttitlelist{1,...,12}{1} \\
    \ganttgroup{Group 1}{1}{7} \\
    \ganttbar{Task 1}{1}{2} \\
    \ganttlinkedbar{Task 2}{3}{7} \ganttnewline
    \ganttcheckin{}{4}
    \ganttmilestone{Milestone}{7}
    \ganttcheckout{}{10}\ganttnewline
    \ganttbar{Final Task}{8}{12}
    \ganttlink{elem2}{elem3}
    \ganttlink{elem3}{elem6}
  \end{ganttchart}
\end{document}

which shows as

Notice in the lines after \newganttchartelement the completely hidden text except the closing }.

[kiryph]

I guess the solution here is to keep this package deactivated by default.

The default vim 9.0 & neovim 0.8.1 setting for conceallevel is 0, i.e. deactivated. So in this circumstance deactivating the part of this syntax for concealment is certainly sensible. Users who have activated conceal, the syntax enhancement could be activated as well.

Also extending g:vimtex_syntax_conceal for fontawesome5 would be a good idea with a note that slowdowns for fontawesome5 (and probably more) have been observed:

*g:vimtex_syntax_conceal*
  A dictionary for specifying which core conceal features to activate. This
  mostly implies concealing particular elements with a replacement unicode
  character. For more info, see |vimtex-syntax-conceal|. To disable all
  conceal features in one go, use |g:vimtex_syntax_conceal_disable|.

  The following keys are available:

    accents~
      Conceal accented characters, e.g. `\^a` --> `â`.

    ligatures~
      Conceal ligatures such as `\aa` --> `å` and `''` --> `“`.

    cites~
      Conceal LaTeX cite commands such as `\citet[...]{ref00}`. The conceal
      style is specified by |g:vimtex_syntax_conceal_cites|.

    fancy~
      Some extra fancy replacements, e.g. `\item` --> ○.

    greek~
      Replace TeX greek letter commands into the equivalent unicode greek
      letter.

    math_bounds~
      Conceal the TeX math bounds characters: pairs of `$` and `$$`, `\(` ...
      `\)`, and `\[` ... `\]`.

    math_delimiters~
      Replace possibly modified math delimiters with a single unicode
      letter. Modified means delimiters prepended with e.g. `\left` or
      `\bigl`. As an example, this will perform the replacement

        `\Biggl\langle ... \Biggr\rangle` --> `〈 ... 〉`

    math_fracs~
      Replace some simple fractions like `\frac 1 2` --> ½.

    math_super_sub~
      Replace simple math super and sub operators, e.g. `x^2` --> `x²`.

    math_symbols~
      Replace various math symbol commands to an equivalent unicode character.
      This includes quite a lot of replacements, so be warned!

    sections~
      Conceal `\(sub)*section` commands. The titles are replaced with Markdown
      style ATX headers, e.g.:

        `\section{Test}`    --> `# Test`
        `\subsection{Test}` --> `## Test`

    styles~
      Conceal the LaTeX command "boundaries" for italicized and bolded style
      commands, i.e. `\emph`, `\textit`, and `\textbf`. This means that one
      will see something like:

        `\emph{text here}` --> `text here`

This would allow users to have concealment for math but not for fontawesome5 symbols.

[lervag]

I've tried to improve the docs related to the conceal stuff. Please see :help vimtex_syntax_packages; you can now disable the fontawesome5 layer with

let g:vimtex_syntax_packages = {'fontawesome5': {'conceal': 0}}

[lervag]

Also extending g:vimtex_syntax_conceal for fontawesome5 would be a good idea with a note that slowdowns for fontawesome5 (and probably more) have been observed:

I instead extended g:vimtex_syntax_packages. The _conceal option is directed to the core part.

[lervag]

I have noticed an issue when enabling the conceal feature with :set conceallevel=1. The fontawesome symbol is not visible and even a too large part of the text is completely hidden.

Reproduced. Looking into it now.

[lervag]

I believe it is fixed now.

[kiryph]

I believe it is fixed now.

Yes, I can confirm this. Though my font does not have a symbol for \faSignIn* and \faSignOut* and shows a fallback symbol.

I instead extended g:vimtex_syntax_packages. The _conceal option is directed to the core part.

I can also confirm that the newly introduced option in g:vimtex_syntax_packages is helpful. Disabling concealment only for fontawesome5 with let g:vimtex_syntax_packages = {'fontawesome5': {'conceal': 0}} but concealment for other symbols active, does resolve this issue.

As always thank you very much.

[lervag]

Glad to hear it! :)