XHProf: Hierarchical Profiler Report

Diff Report: Run #519050cbdc201: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #51904f8640386: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #519050cbdc201	Run #51904f8640386	Diff	Diff%
Number of Function Calls	73	73	0	0.0%
Incl. Wall Time (microsec)	5,363	5,221	-142	-2.6%
Incl. Wall Time (microsec) per call	73	72	-2	-2.6%
Excl. Wall Time (microsec)	1,219	1,179	-40	-3.3%
Incl. CPU (microsecs)	3,617	3,456	-161	-4.5%
Incl. CPU (microsecs) per call	50	47	-2	-4.5%
Excl. CPU (microsec)	991	1,007	16	1.6%
Incl. MemUse (bytes)	56,352	56,352	0	0.0%
Incl. MemUse (bytes) per call	772	772	0	0.0%
Excl. MemUse (bytes)	-96,160	-96,160	0	0.0%
Incl. PeakMemUse (bytes)	93,992	94,272	280	0.3%
Incl. PeakMemUse (bytes) per call	1,288	1,291	4	0.3%
Excl. PeakMemUse (bytes)	16,392	16,528	136	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%	-142	-12.7%	-161	-10.3%	0	0.0%	280	0.3%
Exclusive Metrics Diff for Current Function			-40	-28.2%	16	9.9%	0	N/A%	136	48.6%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-104	-73.2%	-108	-67.1%	0	N/A%	280	100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-38	-26.8%	-53	-32.9%	0	N/A%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-72	-50.7%	-63	-39.1%	0	N/A%	0	0.0%
array_diff	0	N/A%	-69	-48.6%	-90	-55.9%	0	N/A%	0	0.0%
array_keys	0	N/A%	54	38.0%	4	2.5%	0	N/A%	144	51.4%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-30	-21.1%	-24	-14.9%	0	N/A%	0	0.0%
drupal_static	0	N/A%	16	11.3%	-1	-0.6%	0	N/A%	0	0.0%
array_fill_keys	0	N/A%	-1	-0.7%	-3	-1.9%	0	N/A%	0	0.0%