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[VarDumper] Keep and reuse array stubs in memory

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This commit is contained in:
Nicolas Grekas 2017-07-26 15:23:18 +02:00
parent dd9b5eb9ca
commit 92fa55dd8b
1 changed files with 40 additions and 39 deletions
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79
src/Symfony/Component/VarDumper/Cloner/VarCloner.php
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@ -16,8 +16,10 @@ namespace Symfony\Component\VarDumper\Cloner;
*/
class VarCloner extends AbstractCloner
{
private static $gid;
private static $hashMask = 0;
private static $hashOffset = 0;
private static $arrayCache = array();
/**
* {@inheritdoc}
@ -36,14 +38,15 @@ class VarCloner extends AbstractCloner
$maxItems = $this->maxItems;
$maxString = $this->maxString;
$cookie = (object) array(); // Unique object used to detect hard references
$gid = uniqid(mt_rand(), true); // Unique string used to detect the special $GLOBALS variable
$a = null; // Array cast for nested structures
$stub = null; // Stub capturing the main properties of an original item value
// or null if the original value is used directly
if (!self::$hashMask) {
self::$gid = uniqid(mt_rand(), true); // Unique string used to detect the special $GLOBALS variable
self::initHashMask();
}
$gid = self::$gid;
$hashMask = self::$hashMask;
$hashOffset = self::$hashOffset;
$arrayStub = new Stub();
@ -58,9 +61,9 @@ class VarCloner extends AbstractCloner
if (\is_int($k)) {
continue;
}
foreach (array($k => true) as $j => $v) {
foreach (array($k => true) as $gk => $gv) {
}
if ($k !== $j) {
if ($gk !== $k) {
$fromObjCast = true;
$refs = $vals = \array_values($queue[$i]);
break;
@ -95,7 +98,7 @@ class VarCloner extends AbstractCloner
case true === $v:
case \is_int($v):
case \is_float($v):
break;
continue 2;
case \is_string($v):
if (!\preg_match('//u', $v)) {
@ -114,7 +117,10 @@ class VarCloner extends AbstractCloner
$stub->class = Stub::STRING_UTF8;
$stub->cut = $cut;
$stub->value = \mb_substr($v, 0, $maxString, 'UTF-8');
} else {
continue 2;
}
$a = null;
break;
case \is_array($v):
@ -146,11 +152,9 @@ class VarCloner extends AbstractCloner
} else {
$a = $v;
}
} else {
} elseif (\PHP_VERSION_ID < 70200) {
$indexedArrays[$len] = true;
}
$stub->value = \count($a);
break;
case \is_object($v):
@ -210,42 +214,40 @@ class VarCloner extends AbstractCloner
break;
}
if (isset($stub)) {
if ($a) {
if (!$i || 0 > $maxItems) {
$queue[$len] = $a;
$stub->position = $len++;
} elseif ($pos < $maxItems) {
if ($maxItems < $pos += \count($a)) {
$a = \array_slice($a, 0, $maxItems - $pos);
if ($stub->cut >= 0) {
$stub->cut += $pos - $maxItems;
}
if ($a) {
if (!$i || 0 > $maxItems) {
$queue[$len] = $a;
$stub->position = $len++;
} elseif ($pos < $maxItems) {
if ($maxItems < $pos += \count($a)) {
$a = \array_slice($a, 0, $maxItems - $pos);
if ($stub->cut >= 0) {
$stub->cut += $pos - $maxItems;
}
$queue[$len] = $a;
$stub->position = $len++;
} elseif ($stub->cut >= 0) {
$stub->cut += \count($a);
$stub->position = 0;
}
$queue[$len] = $a;
$stub->position = $len++;
} elseif ($stub->cut >= 0) {
$stub->cut += \count($a);
$stub->position = 0;
}
}
if ($arrayStub === $stub) {
if ($arrayStub->cut) {
$stub = array($arrayStub->cut, $arrayStub->class => $arrayStub->position);
$arrayStub->cut = 0;
} else {
$stub = array($arrayStub->class => $arrayStub->position);
}
}
if ($zvalIsRef) {
$refs[$k]->value = $stub;
if ($arrayStub === $stub) {
if ($arrayStub->cut) {
$stub = array($arrayStub->cut, $arrayStub->class => $arrayStub->position);
$arrayStub->cut = 0;
} elseif (isset(self::$arrayCache[$arrayStub->class][$arrayStub->position])) {
$stub = self::$arrayCache[$arrayStub->class][$arrayStub->position];
} else {
$vals[$k] = $stub;
self::$arrayCache[$arrayStub->class][$arrayStub->position] = $stub = array($arrayStub->class => $arrayStub->position);
}
}
$stub = $a = null;
if ($zvalIsRef) {
$refs[$k]->value = $stub;
} else {
$vals[$k] = $stub;
}
}
@ -255,9 +257,9 @@ class VarCloner extends AbstractCloner
$vals = array();
$j = -1;
foreach ($queue[$i] as $k => $v) {
foreach (array($k => true) as $a => $v) {
foreach (array($k => true) as $gk => $gv) {
}
if ($a !== $k) {
if ($gk !== $k) {
$vals = (object) $vals;
$vals->{$k} = $refs[++$j];
$vals = (array) $vals;
@ -268,7 +270,6 @@ class VarCloner extends AbstractCloner
}
$queue[$i] = $vals;
unset($indexedArrays[$i]);
}
foreach ($values as $h => $v) {