XHProf: Hierarchical Profiler Report

Diff Report: Run #517d51ae434de: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #517d52b5a5611: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #517d51ae434de	Run #517d52b5a5611	Diff	Diff%
Number of Function Calls	65	65	0	0.0%
Incl. Wall Time (microsec)	4,971	4,731	-240	-4.8%
Incl. Wall Time (microsec) per call	76	73	-4	-4.8%
Excl. Wall Time (microsec)	1,013	1,001	-12	-1.2%
Incl. CPU (microsecs)	3,246	3,183	-63	-1.9%
Incl. CPU (microsecs) per call	50	49	-1	-1.9%
Excl. CPU (microsec)	842	847	5	0.6%
Incl. MemUse (bytes)	52,472	52,464	-8	-0.0%
Incl. MemUse (bytes) per call	807	807	-0	-0.0%
Excl. MemUse (bytes)	-87,616	-87,192	424	0.5%
Incl. PeakMemUse (bytes)	82,416	82,680	264	0.3%
Incl. PeakMemUse (bytes) per call	1,268	1,272	4	0.3%
Excl. PeakMemUse (bytes)	14,256	14,016	-240	-1.7%

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%	-240	-9.9%	-63	-4.5%	-8	-0.1%	264	2.6%
Exclusive Metrics Diff for Current Function			-12	-5.0%	5	7.9%	424	5300.0%	-240	-90.9%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-260	-108.3%	-81	-128.6%	-8	-100.0%	264	100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	20	8.3%	18	28.6%	0	0.0%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-202	-84.2%	-23	-36.5%	-8	-100.0%	440	166.7%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-21	-8.8%	-25	-39.7%	-8	-100.0%	-8	-3.0%
drupal_static	0	N/A%	-11	-4.6%	-22	-34.9%	0	0.0%	0	0.0%
array_diff	0	N/A%	5	2.1%	6	9.5%	0	0.0%	96	36.4%
array_keys	0	N/A%	1	0.4%	-5	-7.9%	-416	-5200.0%	-24	-9.1%
array_fill_keys	0	N/A%	0	0.0%	1	1.6%	0	0.0%	0	0.0%