XHProf: Hierarchical Profiler Report

Diff Report: Run #5177365b0b425: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #5177392a7fa3c: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #5177365b0b425	Run #5177392a7fa3c	Diff	Diff%
Number of Function Calls	135	135	0	0.0%
Incl. Wall Time (microsec)	5,929	5,624	-305	-5.1%
Incl. Wall Time (microsec) per call	44	42	-2	-5.1%
Excl. Wall Time (microsec)	1,973	1,838	-135	-6.8%
Incl. CPU (microsecs)	4,857	4,511	-346	-7.1%
Incl. CPU (microsecs) per call	36	33	-3	-7.1%
Excl. CPU (microsec)	1,680	1,531	-149	-8.9%
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	-166,864	-64	-0.0%
Incl. PeakMemUse (bytes)	91,672	91,856	184	0.2%
Incl. PeakMemUse (bytes) per call	679	680	1	0.2%
Excl. PeakMemUse (bytes)	20,120	20,280	160	0.8%

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%	-305	-0.9%	-346	-1.0%	0	0.0%	184	0.9%
Exclusive Metrics Diff for Current Function			-135	-44.3%	-149	-43.1%	-64	N/A%	160	87.0%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-302	-99.0%	-341	-98.6%	0	N/A%	184	100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-3	-1.0%	-5	-1.4%	0	N/A%	0	0.0%
*Child functions*
drupal_static	0	N/A%	-52	-17.0%	-60	-17.3%	0	N/A%	24	13.0%
array_keys	0	N/A%	-48	-15.7%	-33	-9.5%	24	N/A%	0	0.0%
Drupal\Core\Database\Connection::query	0	N/A%	-37	-12.1%	-66	-19.1%	40	N/A%	0	0.0%
array_diff	0	N/A%	-34	-11.1%	-44	-12.7%	0	N/A%	0	0.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	1	0.3%	2	0.6%	0	N/A%	0	0.0%
array_fill_keys	0	N/A%	0	0.0%	4	1.2%	0	N/A%	0	0.0%