Only profile GC in hierachical profliing mode.
Only profile GC in hierachical profliing mode.

tideways/php-profiler-extension,lisa2lisa/php-profiler-extension,krakjoe/php-profiler-extension,krakjoe/php-profiler-extension,tideways/php-profiler-extension,lisa2lisa/php-profiler-extension,QafooLabs/php-profiler-extension,QafooLabs/php-profiler-extension