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<?php |
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namespace SilverStripe\Control\Middleware; |
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use SilverStripe\Assets\File; |
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use SilverStripe\Control\Director; |
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use SilverStripe\Control\HTTPRequest; |
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use SilverStripe\Control\HTTPResponse; |
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use SilverStripe\Dev\Debug; |
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/** |
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* Display execution metrics for the current request if in dev mode and `execmetric` is provided as a request variable. |
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*/ |
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class ExecMetricMiddleware implements HTTPMiddleware |
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{ |
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public function process(HTTPRequest $request, callable $delegate) |
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{ |
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if (!$this->showMetric($request)) { |
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return $delegate($request); |
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} |
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$start = microtime(true); |
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try { |
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return $delegate($request); |
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} finally { |
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$end = microtime(true); |
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Debug::message( |
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sprintf( |
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"Execution time: %s, Peak memory usage: %s\n", |
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$this->formatExecutionTime($start, $end), |
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$this->formatPeakMemoryUsage() |
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), |
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false |
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); |
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} |
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} |
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/** |
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* Check if execution metric should be shown. |
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* @param HTTPRequest $request |
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* @return bool |
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*/ |
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private function showMetric(HTTPRequest $request) |
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{ |
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return Director::isDev() && array_key_exists('execmetric', $request->getVars()); |
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} |
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/** |
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* Convert the provided start and end time to a interval in secs. |
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* @param float $start |
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* @param float $end |
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* @return string |
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*/ |
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private function formatExecutionTime($start, $end) |
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{ |
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$diff = round($end - $start, 4); |
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return $diff . ' seconds'; |
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} |
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/** |
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* Get the peak memory usage formatted has a string and a meaningful unit. |
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* @return string |
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*/ |
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private function formatPeakMemoryUsage() |
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{ |
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$bytes = memory_get_peak_usage(true); |
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return File::format_size($bytes); |
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} |
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} |
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silverstripe /
silverstripe-framework
