XHProf: Hierarchical Profiler Report

Diff Report: Run #519ea884c38e9: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #519ea984d991e: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #519ea884c38e9	Run #519ea984d991e	Diff	Diff%
Number of Function Calls	129	129	0	0.0%
Incl. Wall Time (microsec)	6,143	6,015	-128	-2.1%
Incl. Wall Time (microsec) per call	48	47	-1	-2.1%
Excl. Wall Time (microsec)	1,684	1,726	42	2.5%
Incl. CPU (microsecs)	4,183	4,235	52	1.2%
Incl. CPU (microsecs) per call	32	33	0	1.2%
Excl. CPU (microsec)	1,376	1,415	39	2.8%
Incl. MemUse (bytes)	83,688	83,672	-16	-0.0%
Incl. MemUse (bytes) per call	649	649	-0	-0.0%
Excl. MemUse (bytes)	-105,136	-105,152	-16	-0.0%
Incl. PeakMemUse (bytes)	58,152	58,000	-152	-0.3%
Incl. PeakMemUse (bytes) per call	451	450	-1	-0.3%
Excl. PeakMemUse (bytes)	9,136	8,976	-160	-1.8%

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%	-128	-0.4%	52	0.2%	-16	-0.0%	-152	-0.3%
Exclusive Metrics Diff for Current Function			42	32.8%	39	75.0%	-16	-100.0%	-160	-105.3%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-123	-96.1%	37	71.2%	-16	-100.0%	-152	-100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-5	-3.9%	15	28.8%	0	0.0%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-181	-141.4%	17	32.7%	16	100.0%	16	10.5%
drupal_static	0	N/A%	11	8.6%	-4	-7.7%	0	0.0%	0	0.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	7	5.5%	6	11.5%	-16	-100.0%	-8	-5.3%
array_diff	0	N/A%	-5	-3.9%	-2	-3.8%	0	0.0%	0	0.0%
array_keys	0	N/A%	-2	-1.6%	-1	-1.9%	0	0.0%	0	0.0%
array_fill_keys	0	N/A%	0	0.0%	-3	-5.8%	0	0.0%	0	0.0%