XHProf: Hierarchical Profiler Report

Diff Report: Run #518eceb4aac68: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #518ed14bbba55: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #518eceb4aac68	Run #518ed14bbba55	Diff	Diff%
Number of Function Calls	75	75	0	0.0%
Incl. Wall Time (microsec)	4,236	4,018	-218	-5.1%
Incl. Wall Time (microsec) per call	56	54	-3	-5.1%
Excl. Wall Time (microsec)	1,129	1,111	-18	-1.6%
Incl. CPU (microsecs)	3,045	2,923	-122	-4.0%
Incl. CPU (microsecs) per call	41	39	-2	-4.0%
Excl. CPU (microsec)	954	927	-27	-2.8%
Incl. MemUse (bytes)	54,664	54,664	0	0.0%
Incl. MemUse (bytes) per call	729	729	0	0.0%
Excl. MemUse (bytes)	-76,896	-76,888	8	0.0%
Incl. PeakMemUse (bytes)	86,016	86,128	112	0.1%
Incl. PeakMemUse (bytes) per call	1,147	1,148	1	0.1%
Excl. PeakMemUse (bytes)	17,792	17,792	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\Core\Cache\DatabaseBackend::checksumTags	0	N/A%	-218	-79.3%	-122	-39.1%	0	0.0%	112	0.6%
Exclusive Metrics Diff for Current Function			-18	-8.3%	-27	-22.1%	8	N/A%	0	0.0%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-213	-97.7%	-124	-101.6%	0	N/A%	112	100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-5	-2.3%	2	1.6%	0	N/A%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-150	-68.8%	-72	-59.0%	0	N/A%	0	0.0%
drupal_static	0	N/A%	-23	-10.6%	-21	-17.2%	0	N/A%	0	0.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-16	-7.3%	-17	-13.9%	0	N/A%	0	0.0%
array_keys	0	N/A%	-6	-2.8%	12	9.8%	-8	N/A%	48	42.9%
array_diff	0	N/A%	-5	-2.3%	0	0.0%	0	N/A%	64	57.1%
array_fill_keys	0	N/A%	0	0.0%	3	2.5%	0	N/A%	0	0.0%