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Small performance improvement to nibble array re-ordering

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thanks @Intyre
This commit is contained in:
Dylan K. Taylor 2016-12-23 20:07:00 +00:00
parent e2bbb76900
commit a63020d6e5
1 changed files with 4 additions and 8 deletions
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12
src/pocketmine/level/format/generic/GenericChunk.php
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@ -738,16 +738,12 @@ class GenericChunk implements Chunk{
$zx = (($z << 3) | $x);
for($y = 0; $y < 8; ++$y){
$j = (($y << 8) | $zx);
$result{$i++} = chr((ord($array{$j}) & 0x0f) | (ord($array{$j | 0x80}) << 4));
}
}
for($z = 0; $z < 16; ++$z){
$zx = (($z << 3) | $x);
for($y = 0; $y < 8; ++$y){
$j = (($y << 8) | $zx);
$result{$i++} = chr((ord($array{$j}) >> 4) | (ord($array{$j | 0x80}) & 0xf0));
$result{$i} = chr((ord($array{$j}) & 0x0f) | (ord($array{$j | 0x80}) << 4));
$result{$i + 128} = chr((ord($array{$j}) >> 4) | (ord($array{$j | 0x80}) & 0xf0));
$i++;
}
}
$i += 128;
}
return $result;
}