test: Increase bench iterations to 10,000 and format in one line

It takes only ~1s to run with PHP 8.1 on my new machine, which seems
too short to be stable. Increase 10x for a more stable rate.

The single line format make it easier to compare within the same
terminal window by taking less vertical space, as well as e.g. more
readily comparable in commit messages or Phab/Gerrit comments when
before/after are aligned and below one another.

Change-Id: Ie7ea0ea1e506c000397e1b90bf9d28e42b0779aa

Author: Krinkle

test/CSSJanusBenchmark.php

@@ -4,8 +4,7 @@ class CSSJanusBenchmark {
 
 	public function run() {
 		foreach (self::getFixtures() as $name => $data) {
-			$iterations = 1000;
-			$this->outputIntro($name, $data, $iterations);
+			$iterations = 10_000;
 			$total = 0;
 			$max = -INF;
 			$i = 0;
@@ -16,23 +15,23 @@ public function run() {
 				$max = max($max, $took);
 				$total += ( microtime(true) - $start) * 1000;
 			}
-			$this->outputStat($total, $max, $iterations);
+			$this->outputStat($name, $data, $iterations, $total, $max);
 		}
 	}
 
-	protected function outputIntro($name, $data, $iterations) {
-		echo "\n## {$name}\n"
-			. "- data length: " . $this->formatSize(strlen($data)) . "\n"
-			. "- data hash:   " . hash('fnv132', $data) . "\n"
-			. "- iterations:  " . $iterations . "\n";
-	}
-
-	protected function outputStat($total, $max, $iterations) {
+	protected function outputStat($name, $data, $iterations, $total, $max) {
+		$version = hash('fnv132', $data);
 		$mean = $total / $iterations; // in milliseconds
 		$ratePerSecond = 1.0 / ( $mean / 1000.0 );
-		echo "- max:         " . sprintf('%.2fms', $max) . "\n";
-		echo "- mean:        " . sprintf('%.2fms', $mean) . "\n";
-		echo "- rate:        " . sprintf('%.0f/s', $ratePerSecond) . "\n";
+
+		echo sprintf(
+			"* %-35s iterations=%d max=%.2fms mean=%.2fms rate=%.0f/s\n",
+			"$name ($version)",
+			$iterations,
+			$max,
+			$mean,
+			$ratePerSecond
+		);
 	}
 
 	private function formatSize($size) {