XHProf: Hierarchical Profiler Report

Diff Report: Run #51ec517fc2424: XHProf Run (Namespace=drupal-perf-drupalcon)
vs.
Run #51ec52a09990a: XHProf Run (Namespace=drupal-perf-drupalcon)
Tip: Click a function name below to drill down.

drupal_clean_css_identifier	Run #51ec517fc2424	Run #51ec52a09990a	Diff	Diff%
Number of Function Calls	41	41	0	0.0%
Incl. Wall Time (microsec)	952	896	-56	-5.9%
Incl. Wall Time (microsec) per call	23	22	-1	-5.9%
Excl. Wall Time (microsec)	271	263	-8	-3.0%
Incl. CPU (microsecs)	1,001	939	-62	-6.2%
Incl. CPU (microsecs) per call	24	23	-2	-6.2%
Excl. CPU (microsec)	254	241	-13	-5.1%
Incl. MemUse (bytes)	10,640	10,952	312	2.9%
Incl. MemUse (bytes) per call	260	267	8	2.9%
Excl. MemUse (bytes)	1,168	1,304	136	11.6%
Incl. PeakMemUse (bytes)	636,992	582,440	-54,552	-8.6%
Incl. PeakMemUse (bytes) per call	15,536	14,206	-1,331	-8.6%
Excl. PeakMemUse (bytes)	6,432	6,048	-384	-6.0%

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%	-56	-1.4%	-62	-1.5%	312	1.4%	-54,552	-237.3%
Exclusive Metrics Diff for Current Function			-8	-14.3%	-13	-21.0%	136	43.6%	-384	-0.7%
*Parent functions*
drupal_html_class	0	N/A%	-54	-96.4%	-53	-85.5%	312	100.0%	-54,520	-99.9%
Drupal\views\Plugin\views\style\StylePluginBase::getRowClass	0	N/A%	-4	-7.1%	-4	-6.5%	0	0.0%	0	0.0%
template_preprocess_views_view_fields	0	N/A%	3	5.4%	2	3.2%	0	0.0%	-32	-0.1%
Drupal\views\Plugin\views\field\FieldPluginBase::elementClasses	0	N/A%	-1	-1.8%	-9	-14.5%	0	0.0%	0	0.0%
template_preprocess_views_view	0	N/A%	0	0.0%	1	1.6%	0	0.0%	0	0.0%
Drupal\views\Plugin\views\field\FieldPluginBase::elementWrapperClasses	0	N/A%	0	0.0%	1	1.6%	0	0.0%	0	0.0%
*Child functions*
strtr	0	N/A%	-46	-82.1%	-50	-80.6%	96	30.8%	-54,168	-99.3%
preg_replace	0	N/A%	-2	-3.6%	1	1.6%	80	25.6%	0	0.0%