XHProf: Hierarchical Profiler Report

Diff Report: Run #51774c26bf054: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #51774cdfb1214: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #51774c26bf054	Run #51774cdfb1214	Diff	Diff%
Number of Function Calls	135	135	0	0.0%
Incl. Wall Time (microsec)	6,342	6,090	-252	-4.0%
Incl. Wall Time (microsec) per call	47	45	-2	-4.0%
Excl. Wall Time (microsec)	1,772	1,783	11	0.6%
Incl. CPU (microsecs)	4,538	4,411	-127	-2.8%
Incl. CPU (microsecs) per call	34	33	-1	-2.8%
Excl. CPU (microsec)	1,461	1,534	73	5.0%
Incl. MemUse (bytes)	86,640	86,640	0	0.0%
Incl. MemUse (bytes) per call	642	642	0	0.0%
Excl. MemUse (bytes)	-166,800	-166,824	-24	-0.0%
Incl. PeakMemUse (bytes)	91,672	91,568	-104	-0.1%
Incl. PeakMemUse (bytes) per call	679	678	-1	-0.1%
Excl. PeakMemUse (bytes)	20,120	20,008	-112	-0.6%

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%	-252	-1.0%	-127	-0.5%	0	0.0%	-104	-0.9%
Exclusive Metrics Diff for Current Function			11	4.4%	73	57.5%	-24	N/A%	-112	-107.7%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-260	-103.2%	-136	-107.1%	0	N/A%	-104	-100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	8	3.2%	9	7.1%	0	N/A%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-197	-78.2%	-62	-48.8%	16	N/A%	0	0.0%
array_keys	0	N/A%	-56	-22.2%	-76	-59.8%	8	N/A%	8	7.7%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-22	-8.7%	-22	-17.3%	0	N/A%	0	0.0%
drupal_static	0	N/A%	11	4.4%	-16	-12.6%	0	N/A%	0	0.0%
array_diff	0	N/A%	1	0.4%	-19	-15.0%	0	N/A%	0	0.0%
array_fill_keys	0	N/A%	0	0.0%	-5	-3.9%	0	N/A%	0	0.0%