XHProf: Hierarchical Profiler Report

Diff Report: Run #518080a5ca60d: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #518081a41c05e: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #518080a5ca60d	Run #518081a41c05e	Diff	Diff%
Number of Function Calls	66	66	0	0.0%
Incl. Wall Time (microsec)	5,100	5,157	57	1.1%
Incl. Wall Time (microsec) per call	77	78	1	1.1%
Excl. Wall Time (microsec)	1,037	1,036	-1	-0.1%
Incl. CPU (microsecs)	3,414	3,343	-71	-2.1%
Incl. CPU (microsecs) per call	52	51	-1	-2.1%
Excl. CPU (microsec)	850	864	14	1.6%
Incl. MemUse (bytes)	52,976	52,928	-48	-0.1%
Incl. MemUse (bytes) per call	803	802	-1	-0.1%
Excl. MemUse (bytes)	-88,248	-87,848	400	0.5%
Incl. PeakMemUse (bytes)	88,336	88,576	240	0.3%
Incl. PeakMemUse (bytes) per call	1,338	1,342	4	0.3%
Excl. PeakMemUse (bytes)	13,296	13,432	136	1.0%

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%	57	4.7%	-71	-5.5%	-48	-1.1%	240	5.5%
Exclusive Metrics Diff for Current Function			-1	-1.8%	14	19.7%	400	833.3%	136	56.7%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	65	114.0%	-66	-93.0%	-48	-100.0%	240	100.0%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-8	-14.0%	-5	-7.0%	0	0.0%	0	0.0%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	70	122.8%	-61	-85.9%	-8	-16.7%	232	96.7%
array_keys	0	N/A%	-10	-17.5%	-6	-8.5%	-416	-866.7%	-64	-26.7%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	-6	-10.5%	-5	-7.0%	-24	-50.0%	-8	-3.3%
drupal_static	0	N/A%	5	8.8%	2	2.8%	0	0.0%	0	0.0%
array_diff	0	N/A%	-2	-3.5%	-15	-21.1%	0	0.0%	-56	-23.3%
array_fill_keys	0	N/A%	1	1.8%	0	0.0%	0	0.0%	0	0.0%