XHProf: Hierarchical Profiler Report

Diff Report: Run #51990ceb6ce00: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #51990c6b6ce43: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #51990ceb6ce00	Run #51990c6b6ce43	Diff	Diff%
Number of Function Calls	73	73	0	0.0%
Incl. Wall Time (microsec)	3,011	2,808	-203	-6.7%
Incl. Wall Time (microsec) per call	41	38	-3	-6.7%
Excl. Wall Time (microsec)	930	899	-31	-3.3%
Incl. CPU (microsecs)	2,307	2,200	-107	-4.6%
Incl. CPU (microsecs) per call	32	30	-1	-4.6%
Excl. CPU (microsec)	748	741	-7	-0.9%
Incl. MemUse (bytes)	51,976	51,976	0	0.0%
Incl. MemUse (bytes) per call	712	712	0	0.0%
Excl. MemUse (bytes)	-42,616	-42,616	0	0.0%
Incl. PeakMemUse (bytes)	48,176	47,912	-264	-0.5%
Incl. PeakMemUse (bytes) per call	660	656	-4	-0.5%
Excl. PeakMemUse (bytes)	7,552	7,552	0	0.0%

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%	-203	-45.1%	-107	-8.7%	0	0.0%	-264	-0.9%
Exclusive Metrics Diff for Current Function			-31	-15.3%	-7	-6.5%	0	N/A%	0	0.0%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-206	-101.5%	-109	-101.9%	0	N/A%	-272	-103.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	3	1.5%	2	1.9%	0	N/A%	8	3.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-135	-66.5%	-52	-48.6%	0	N/A%	0	0.0%
array_keys	0	N/A%	-24	-11.8%	-21	-19.6%	0	N/A%	-80	-30.3%
array_diff	0	N/A%	16	7.9%	6	5.6%	0	N/A%	-184	-69.7%
drupal_static	0	N/A%	-15	-7.4%	-18	-16.8%	0	N/A%	0	0.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-14	-6.9%	-13	-12.1%	0	N/A%	0	0.0%
array_fill_keys	0	N/A%	0	0.0%	-2	-1.9%	0	N/A%	0	0.0%