XHProf: Hierarchical Profiler Report

Diff Report: Run #51a9459592df6: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #51a944519b58c: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #51a9459592df6	Run #51a944519b58c	Diff	Diff%
Number of Function Calls	125	125	0	0.0%
Incl. Wall Time (microsec)	6,114	6,316	202	3.3%
Incl. Wall Time (microsec) per call	49	51	2	3.3%
Excl. Wall Time (microsec)	1,762	1,784	22	1.2%
Incl. CPU (microsecs)	4,397	4,514	117	2.7%
Incl. CPU (microsecs) per call	35	36	1	2.7%
Excl. CPU (microsec)	1,420	1,439	19	1.3%
Incl. MemUse (bytes)	85,880	85,864	-16	-0.0%
Incl. MemUse (bytes) per call	687	687	-0	-0.0%
Excl. MemUse (bytes)	-136,032	-135,968	64	0.0%
Incl. PeakMemUse (bytes)	84,472	84,160	-312	-0.4%
Incl. PeakMemUse (bytes) per call	676	673	-2	-0.4%
Excl. PeakMemUse (bytes)	23,520	23,256	-264	-1.1%

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%	202	1.9%	117	1.1%	-16	-0.0%	-312	-0.2%
Exclusive Metrics Diff for Current Function			22	10.9%	19	16.2%	64	400.0%	-264	-84.6%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	195	96.5%	112	95.7%	-16	-100.0%	-312	-100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	7	3.5%	5	4.3%	0	0.0%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	95	47.0%	5	4.3%	0	0.0%	-64	-20.5%
array_keys	0	N/A%	39	19.3%	31	26.5%	-72	-450.0%	0	0.0%
drupal_static	0	N/A%	27	13.4%	21	17.9%	0	0.0%	0	0.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	13	6.4%	14	12.0%	-8	-50.0%	-8	-2.6%
array_diff	0	N/A%	5	2.5%	26	22.2%	0	0.0%	24	7.7%
array_fill_keys	0	N/A%	1	0.5%	1	0.9%	0	0.0%	0	0.0%