XHProf: Hierarchical Profiler Report

Diff Report: Run #5192e6f7bc551: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #5192e84845baf: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #5192e6f7bc551	Run #5192e84845baf	Diff	Diff%
Number of Function Calls	77	77	0	0.0%
Incl. Wall Time (microsec)	5,731	5,254	-477	-8.3%
Incl. Wall Time (microsec) per call	74	68	-6	-8.3%
Excl. Wall Time (microsec)	1,323	1,279	-44	-3.3%
Incl. CPU (microsecs)	3,850	3,638	-212	-5.5%
Incl. CPU (microsecs) per call	50	47	-3	-5.5%
Excl. CPU (microsec)	1,110	1,072	-38	-3.4%
Incl. MemUse (bytes)	58,312	58,312	0	0.0%
Incl. MemUse (bytes) per call	757	757	0	0.0%
Excl. MemUse (bytes)	-102,432	-102,432	0	0.0%
Incl. PeakMemUse (bytes)	107,048	107,064	16	0.0%
Incl. PeakMemUse (bytes) per call	1,390	1,390	0	0.0%
Excl. PeakMemUse (bytes)	17,216	17,232	16	0.1%

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%	-477	-93.5%	-212	-20.6%	0	0.0%	16	0.0%
Exclusive Metrics Diff for Current Function			-44	-9.2%	-38	-17.9%	0	N/A%	16	100.0%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-383	-80.3%	-173	-81.6%	0	N/A%	16	100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-94	-19.7%	-39	-18.4%	0	N/A%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-375	-78.6%	-114	-53.8%	0	N/A%	8	50.0%
array_diff	0	N/A%	-19	-4.0%	-16	-7.5%	0	N/A%	0	0.0%
array_keys	0	N/A%	-15	-3.1%	-7	-3.3%	0	N/A%	8	50.0%
drupal_static	0	N/A%	-14	-2.9%	-21	-9.9%	0	N/A%	-16	-100.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-11	-2.3%	-12	-5.7%	0	N/A%	0	0.0%
array_fill_keys	0	N/A%	1	0.2%	-4	-1.9%	0	N/A%	0	0.0%