XHProf: Hierarchical Profiler Report

Diff Report: Run #51ec623000e0c: XHProf Run (Namespace=drupal-perf-drupalcon)
vs.
Run #51ec66a5a877d: XHProf Run (Namespace=drupal-perf-drupalcon)
Tip: Click a function name below to drill down.

drupal_clean_css_identifier	Run #51ec623000e0c	Run #51ec66a5a877d	Diff	Diff%
Number of Function Calls	66	66	0	0.0%
Incl. Wall Time (microsec)	996	975	-21	-2.1%
Incl. Wall Time (microsec) per call	15	15	-0	-2.1%
Excl. Wall Time (microsec)	439	437	-2	-0.5%
Incl. CPU (microsecs)	1,046	1,027	-19	-1.8%
Incl. CPU (microsecs) per call	16	16	-0	-1.8%
Excl. CPU (microsec)	405	417	12	3.0%
Incl. MemUse (bytes)	12,728	12,712	-16	-0.1%
Incl. MemUse (bytes) per call	193	193	-0	-0.1%
Excl. MemUse (bytes)	-248	-232	16	6.5%
Incl. PeakMemUse (bytes)	359,920	357,424	-2,496	-0.7%
Incl. PeakMemUse (bytes) per call	5,453	5,416	-38	-0.7%
Excl. PeakMemUse (bytes)	1,744	1,744	0	0.0%

Function Name	Calls Diff	Calls Diff%	Incl. Wall Diff (microsec)	IWall Diff%	Incl. CPU Diff (microsec)	ICpu Diff%	Incl. MemUse Diff (bytes)	IMemUse Diff%	Incl. PeakMemUse Diff (bytes)	IPeakMemUse Diff%
*Current Function*
drupal_clean_css_identifier	0	N/A%	-21	-0.9%	-19	-0.6%	-16	-0.0%	-2,496	-3.4%
Exclusive Metrics Diff for Current Function			-2	-9.5%	12	63.2%	16	100.0%	0	0.0%
*Parent functions*
drupal_html_class	0	N/A%	-29	-138.1%	-28	-147.4%	-24	-150.0%	-2,512	-100.6%
template_preprocess_views_view	0	N/A%	11	52.4%	12	63.2%	-32	-200.0%	0	0.0%
Drupal\views\Plugin\views\field\FieldPluginBase::elementClasses	0	N/A%	-2	-9.5%	-1	-5.3%	0	0.0%	0	0.0%
Drupal\views\Plugin\views\style\StylePluginBase::getRowClass	0	N/A%	-2	-9.5%	-3	-15.8%	40	250.0%	0	0.0%
template_preprocess_views_view_fields	0	N/A%	1	4.8%	1	5.3%	0	0.0%	16	0.6%
Drupal\views\Plugin\views\field\FieldPluginBase::elementWrapperClasses	0	N/A%	0	0.0%	0	0.0%	0	0.0%	0	0.0%
*Child functions*
strtr	0	N/A%	-26	-123.8%	-33	-173.7%	-24	-150.0%	-2,496	-100.0%
preg_replace	0	N/A%	7	33.3%	2	10.5%	-8	-50.0%	0	0.0%