/**
* PerformanceSnapshot constructor.
* @param PerformanceSnapshotInterface|null $prev
*/
public function __construct(PerformanceSnapshotInterface $prev = null)
{
$this->created = Utils::getMicroTime();
if ($prev instanceof PerformanceSnapshotInterface) {
$this->timePassed = bcsub($this->creationTime(), $prev->creationTime(), 4);
} else {
$prev = new PerformanceSnapshotNullObject();
$this->timePassed = 0;
}
$this->numClassesDeclaredTotal = count(get_declared_classes());
$this->numFilesIncludedTotal = count(get_included_files());
$this->numClassesDeclared = $this->numClassesDeclaredTotal - $prev->numTotalClassesDeclared();
$this->numFilesIncluded = $this->numFilesIncludedTotal - $prev->numTotalFilesIncluded();
$this->memoryAllocated = round(memory_get_usage() / 1024 / 1024, 4);
$this->memoryAllocatedDiff = bcsub($this->memoryAllocated, $prev->memoryAllocated(), 4);
}
