Diff Report
Run #519be9a13e594: XHProf Run (Namespace=drupal-perf-drupalcon)
vs.
Run #519bea9000214: XHProf Run (Namespace=drupal-perf-drupalcon)
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Regression/Improvement summary for Drupal\Core\Cache\DatabaseBackend::prepareItem

Drupal\Core\Cache\DatabaseBackend::prepareItemRun #519be9a13e594Run #519bea9000214DiffDiff%
Number of Function Calls96 97 1 1.0%
Incl. Wall Time (microsec)33,853 34,612 759 2.2%
Incl. Wall Time (microsec) per call 353 357 4 1.2%
Excl. Wall Time (microsec)2,013 2,079 66 3.3%
Incl. CPU (microsecs)28,432 28,577 145 0.5%
Incl. CPU (microsecs) per call 296 295 -2 -0.5%
Excl. CPU (microsec)1,897 1,930 33 1.7%
Incl. MemUse (bytes)934,320 934,464 144 0.0%
Incl. MemUse (bytes) per call 9,733 9,634 -99 -1.0%
Excl. MemUse (bytes)-253,472 -253,596 -124 -0.0%
Incl. PeakMemUse (bytes)1,359,832 1,364,460 4,628 0.3%
Incl. PeakMemUse (bytes) per call 14,165 14,067 -98 -0.7%
Excl. PeakMemUse (bytes)5,804 5,848 44 0.8%

Parent/Child Regression/Improvement report for Drupal\Core\Cache\DatabaseBackend::prepareItem [View Callgraph Diff]


Function NameCalls DiffCalls
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::prepareItem1 33.3% 759 20.1% 145 6.2% 144 0.6% 4,628 18.0%
Exclusive Metrics Diff for Current Function66 8.7% 33 22.8% -124 -86.1% 44 1.0%
Parent function
Drupal\Core\Cache\DatabaseBackend::getMultiple1 100.0% 759 100.0% 145 100.0% 144 100.0% 4,628 100.0%
Child functions
unserialize1 50.0% 495 65.2% 98 67.6% -20 -13.9% 4,028 87.0%
Drupal\Core\Cache\DatabaseBackend::checksumTags1 50.0% 211 27.8% 25 17.2% 288 200.0% 556 12.0%
explode0 0.0% -13 -1.7% -11 -7.6% 0 0.0% 0 0.0%