XHProf: Hierarchical Profiler Report

Diff Report: Run #519af3b0bf970: XHProf Run (Namespace=drupal-perf-cottser)
vs.
Run #519af59f030f2: XHProf Run (Namespace=drupal-perf-cottser)
Tip: Click a function name below to drill down.

Drupal\Core\Cache\DatabaseBackend::checksumTags	Run #519af3b0bf970	Run #519af59f030f2	Diff	Diff%
Number of Function Calls	110	110	0	0.0%
Incl. Wall Time (microsec)	4,889	4,767	-122	-2.5%
Incl. Wall Time (microsec) per call	44	43	-1	-2.5%
Excl. Wall Time (microsec)	1,443	1,419	-24	-1.7%
Incl. CPU (microsecs)	3,797	3,697	-100	-2.6%
Incl. CPU (microsecs) per call	35	34	-1	-2.6%
Excl. CPU (microsec)	1,163	1,121	-42	-3.6%
Incl. MemUse (bytes)	74,416	74,400	-16	-0.0%
Incl. MemUse (bytes) per call	677	676	-0	-0.0%
Excl. MemUse (bytes)	-108,256	-108,256	0	0.0%
Incl. PeakMemUse (bytes)	62,024	61,976	-48	-0.1%
Incl. PeakMemUse (bytes) per call	564	563	-0	-0.1%
Excl. PeakMemUse (bytes)	10,032	10,032	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%	-122	-4.9%	-100	-4.0%	-16	-0.0%	-48	-0.1%
Exclusive Metrics Diff for Current Function			-24	-19.7%	-42	-42.0%	0	0.0%	0	0.0%
*Parent functions*
Drupal\Core\Cache\DatabaseBackend::prepareItem	0	N/A%	-117	-95.9%	-99	-99.0%	-16	-100.0%	-128	-266.7%
Drupal\Core\Cache\DatabaseBackend::prepareItem@1	0	N/A%	-5	-4.1%	-1	-1.0%	0	0.0%	80	166.7%
*Child functions*
Drupal\Core\Database\Connection::query	0	N/A%	-84	-68.9%	-68	-68.0%	0	0.0%	-80	-166.7%
drupal_static	0	N/A%	-15	-12.3%	-11	-11.0%	0	0.0%	0	0.0%
array_keys	0	N/A%	7	5.7%	25	25.0%	-16	-100.0%	48	100.0%
array_diff	0	N/A%	-6	-4.9%	0	0.0%	0	0.0%	-16	-33.3%
array_fill_keys	0	N/A%	0	0.0%	-3	-3.0%	0	0.0%	0	0.0%
Drupal\Core\Database\Statement::fetchAllAssoc	0	N/A%	0	0.0%	-1	-1.0%	0	0.0%	0	0.0%