XHProf: Hierarchical Profiler Report

Diff Report: Run #51981e3ae1e6c: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #51981beb768ad: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #51981e3ae1e6c	Run #51981beb768ad	Diff	Diff%
Number of Function Calls	84	84	0	0.0%
Incl. Wall Time (microsec)	5,690	5,736	46	0.8%
Incl. Wall Time (microsec) per call	68	68	1	0.8%
Excl. Wall Time (microsec)	1,472	1,436	-36	-2.4%
Incl. CPU (microsecs)	3,918	3,922	4	0.1%
Incl. CPU (microsecs) per call	47	47	0	0.1%
Excl. CPU (microsec)	1,259	1,216	-43	-3.4%
Incl. MemUse (bytes)	68,616	68,616	0	0.0%
Incl. MemUse (bytes) per call	817	817	0	0.0%
Excl. MemUse (bytes)	-99,512	-99,552	-40	-0.0%
Incl. PeakMemUse (bytes)	79,936	79,904	-32	-0.0%
Incl. PeakMemUse (bytes) per call	952	951	-0	-0.0%
Excl. PeakMemUse (bytes)	18,048	18,000	-48	-0.3%

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%	46	37.4%	4	0.8%	0	0.0%	-32	-0.1%
Exclusive Metrics Diff for Current Function			-36	-78.3%	-43	-1075.0%	-40	N/A%	-48	-150.0%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	28	60.9%	3	75.0%	0	N/A%	-32	-100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	18	39.1%	1	25.0%	0	N/A%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	92	200.0%	42	1050.0%	0	N/A%	0	0.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	36	78.3%	31	775.0%	0	N/A%	0	0.0%
drupal_static	0	N/A%	-24	-52.2%	-26	-650.0%	0	N/A%	16	50.0%
array_keys	0	N/A%	-15	-32.6%	3	75.0%	40	N/A%	0	0.0%
array_diff	0	N/A%	-7	-15.2%	-2	-50.0%	0	N/A%	0	0.0%
array_fill_keys	0	N/A%	0	0.0%	-1	-25.0%	0	N/A%	0	0.0%