XHProf: Hierarchical Profiler Report

Diff Report: Run #519fedcae68c3: XHProf Run (Namespace=drupal-perf-joelpittet)
vs.
Run #519ff0715b88b: XHProf Run (Namespace=drupal-perf-joelpittet)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #519fedcae68c3	Run #519ff0715b88b	Diff	Diff%
Number of Function Calls	78	78	0	0.0%
Incl. Wall Time (microsec)	7,600	6,660	-940	-12.4%
Incl. Wall Time (microsec) per call	97	85	-12	-12.4%
Excl. Wall Time (microsec)	1,460	1,429	-31	-2.1%
Incl. CPU (microsecs)	4,272	4,074	-198	-4.6%
Incl. CPU (microsecs) per call	55	52	-3	-4.6%
Excl. CPU (microsec)	1,197	1,190	-7	-0.6%
Incl. MemUse (bytes)	56,368	56,368	0	0.0%
Incl. MemUse (bytes) per call	723	723	0	0.0%
Excl. MemUse (bytes)	-81,816	-81,824	-8	-0.0%
Incl. PeakMemUse (bytes)	49,728	49,984	256	0.5%
Incl. PeakMemUse (bytes) per call	638	641	3	0.5%
Excl. PeakMemUse (bytes)	8,800	8,904	104	1.2%

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%	-940	-75.3%	-198	-13.4%	0	0.0%	256	0.3%
Exclusive Metrics Diff for Current Function			-31	-3.3%	-7	-3.5%	-8	N/A%	104	40.6%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-950	-101.1%	-162	-81.8%	0	N/A%	256	100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	10	1.1%	-36	-18.2%	0	N/A%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-830	-88.3%	-90	-45.5%	0	N/A%	-32	-12.5%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-98	-10.4%	-99	-50.0%	0	N/A%	0	0.0%
drupal_static	0	N/A%	14	1.5%	-4	-2.0%	0	N/A%	56	21.9%
array_keys	0	N/A%	7	0.7%	1	0.5%	8	N/A%	72	28.1%
array_diff	0	N/A%	-2	-0.2%	-5	-2.5%	0	N/A%	56	21.9%
array_fill_keys	0	N/A%	0	0.0%	6	3.0%	0	N/A%	0	0.0%