XHProf: Hierarchical Profiler Report

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

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #517d52b5a5611	Run #517d51ae434de	Diff	Diff%
Number of Function Calls	65	65	0	0.0%
Incl. Wall Time (microsec)	4,731	4,971	240	5.1%
Incl. Wall Time (microsec) per call	73	76	4	5.1%
Excl. Wall Time (microsec)	1,001	1,013	12	1.2%
Incl. CPU (microsecs)	3,183	3,246	63	2.0%
Incl. CPU (microsecs) per call	49	50	1	2.0%
Excl. CPU (microsec)	847	842	-5	-0.6%
Incl. MemUse (bytes)	52,464	52,472	8	0.0%
Incl. MemUse (bytes) per call	807	807	0	0.0%
Excl. MemUse (bytes)	-87,192	-87,616	-424	-0.5%
Incl. PeakMemUse (bytes)	82,680	82,416	-264	-0.3%
Incl. PeakMemUse (bytes) per call	1,272	1,268	-4	-0.3%
Excl. PeakMemUse (bytes)	14,016	14,256	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%