переменная нужна для memory_get_usage, чистится автоматом

ryr · ryr · commit ad7f6498e1f8 · 2017-05-26T15:28:29.000+07:00
diff --git a/bench.php b/bench.php
@@ -625,7 +625,6 @@ function test_02_String_Concat()
 		for ($i = 0; $i < $count; ++$i) {
 			$s .= '- Valar dohaeris' . PHP_EOL;
 		}
-		$s = '';
 	}
 	return format_result_test(get_microtime() - $time_start, $count*$stringConcatLoopRepeat, memory_get_usage(true));
 }

Original file line number	Diff line number	Diff line change
`@@ -625,7 +625,6 @@ function test_02_String_Concat()`
`625`	`625`	`for ($i = 0; $i < $count; ++$i) {`
`626`	`626`	`$s .= '- Valar dohaeris' . PHP_EOL;`
`627`	`627`	`}`
`628`		`- $s = '';`
`629`	`628`	`}`
`630`	`629`	`return format_result_test(get_microtime() - $time_start, $count*$stringConcatLoopRepeat, memory_get_usage(true));`
`631`	`630`	`}`