XHProf: Hierarchical Profiler Report

Diff Report: Run #51ec3c5ab9ae4: XHProf Run (Namespace=drupal-perf-drupalcon)
vs.
Run #51ec3b81ad265: XHProf Run (Namespace=drupal-perf-drupalcon)
Tip: Click a function name below to drill down.

Drupal\Core\Database\Database::openConnection	Run #51ec3c5ab9ae4	Run #51ec3b81ad265	Diff	Diff%
Number of Function Calls	1	1	0	0.0%
Incl. Wall Time (microsec)	948	1,337	389	41.0%
Incl. Wall Time (microsec) per call	948	1,337	389	41.0%
Excl. Wall Time (microsec)	34	33	-1	-2.9%
Incl. CPU (microsecs)	510	700	190	37.3%
Incl. CPU (microsecs) per call	510	700	190	37.3%
Excl. CPU (microsec)	28	26	-2	-7.1%
Incl. MemUse (bytes)	153,112	153,128	16	0.0%
Incl. MemUse (bytes) per call	153,112	153,128	16	0.0%
Excl. MemUse (bytes)	3,512	3,512	0	0.0%
Incl. PeakMemUse (bytes)	150,272	150,288	16	0.0%
Incl. PeakMemUse (bytes) per call	150,272	150,288	16	0.0%
Excl. PeakMemUse (bytes)	3,704	3,704	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\Database\Database::openConnection	0	N/A%	389	104.0%	190	17.9%	16	0.0%	16	0.0%
Exclusive Metrics Diff for Current Function			-1	-0.3%	-2	-1.1%	0	0.0%	0	0.0%
*Parent function*
Drupal\Core\Database\Database::getConnection	0	N/A%	389	100.0%	190	100.0%	16	100.0%	16	100.0%
*Child functions*
Drupal\Core\Database\Driver\mysql\Connection::open	0	N/A%	392	100.8%	193	101.6%	16	100.0%	16	100.0%
Symfony\Component\ClassLoader\ApcClassLoader::loadClass	0	N/A%	-3	-0.8%	-2	-1.1%	0	0.0%	0	0.0%
Drupal\Core\Database\Database::parseConnectionInfo	0	N/A%	1	0.3%	1	0.5%	0	0.0%	0	0.0%
Drupal\Core\Database\Connection::setKey	0	N/A%	0	0.0%	0	0.0%	0	0.0%	0	0.0%
Drupal\Core\Database\Driver\mysql\Connection::__construct	0	N/A%	0	0.0%	0	0.0%	0	0.0%	0	0.0%
Drupal\Core\Database\Connection::setTarget	0	N/A%	0	0.0%	0	0.0%	0	0.0%	0	0.0%