XHProf: Hierarchical Profiler Report

Diff Report: Run #519dd86a86681: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #519dd95192eac: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #519dd86a86681	Run #519dd95192eac	Diff	Diff%
Number of Function Calls	130	130	0	0.0%
Incl. Wall Time (microsec)	6,667	6,160	-507	-7.6%
Incl. Wall Time (microsec) per call	51	47	-4	-7.6%
Excl. Wall Time (microsec)	1,801	1,717	-84	-4.7%
Incl. CPU (microsecs)	4,423	4,266	-157	-3.5%
Incl. CPU (microsecs) per call	34	33	-1	-3.5%
Excl. CPU (microsec)	1,490	1,404	-86	-5.8%
Incl. MemUse (bytes)	84,240	84,240	0	0.0%
Incl. MemUse (bytes) per call	648	648	0	0.0%
Excl. MemUse (bytes)	-105,728	-105,728	0	0.0%
Incl. PeakMemUse (bytes)	59,296	59,296	0	0.0%
Incl. PeakMemUse (bytes) per call	456	456	0	0.0%
Excl. PeakMemUse (bytes)	9,256	9,256	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%	-507	-43.9%	-157	-33.9%	0	N/A%	0	N/A%
Exclusive Metrics Diff for Current Function			-84	-16.6%	-86	-54.8%	0	N/A%	0	N/A%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-503	-99.2%	-159	-101.3%	0	N/A%	0	N/A%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-4	-0.8%	2	1.3%	0	N/A%	0	N/A%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-356	-70.2%	-3	-1.9%	0	N/A%	0	N/A%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-29	-5.7%	-27	-17.2%	0	N/A%	0	N/A%
array_diff	0	N/A%	-17	-3.4%	-25	-15.9%	0	N/A%	0	N/A%
array_keys	0	N/A%	-10	-2.0%	-10	-6.4%	0	N/A%	0	N/A%
drupal_static	0	N/A%	-9	-1.8%	-3	-1.9%	0	N/A%	0	N/A%
array_fill_keys	0	N/A%	-2	-0.4%	-3	-1.9%	0	N/A%	0	N/A%