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BlockStateLookupCache: combine arrays for stateless and stateful blocks

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this reduces memory usage by another 20 KB or so.
This commit is contained in:
Dylan K. Taylor 2023-05-04 15:29:27 +01:00
parent d2c37d8bcf
commit 897ba9f2d9
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1 changed files with 16 additions and 17 deletions
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33
src/network/mcpe/convert/BlockStateLookupCache.php
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@ -27,6 +27,8 @@ use pocketmine\data\bedrock\block\BlockStateData;
use pocketmine\utils\Utils;
use function array_key_first;
use function count;
use function is_array;
use function is_int;
/**
* Facilitates quickly looking up a block's state ID based on its NBT.
@ -34,31 +36,27 @@ use function count;
final class BlockStateLookupCache{
/**
* @var int[][]
* @phpstan-var array<string, array<string, int>>
* @var int[][]|int[]
* @phpstan-var array<string, array<string, int>|int>
*/
private array $nameToNetworkIdsLookup = [];
/**
* @var int[]
* @phpstan-var array<string, int>
*/
private array $nameToSingleNetworkIdLookup = [];
/**
* @param BlockStateDictionaryEntry[] $blockStates
* @phpstan-param list<BlockStateDictionaryEntry> $blockStates
*/
public function __construct(array $blockStates){
$table = [];
foreach($blockStates as $stateId => $stateNbt){
$this->nameToNetworkIdsLookup[$stateNbt->getStateName()][$stateNbt->getRawStateProperties()] = $stateId;
$table[$stateNbt->getStateName()][$stateNbt->getRawStateProperties()] = $stateId;
}
//setup fast path for stateless blocks
foreach(Utils::stringifyKeys($this->nameToNetworkIdsLookup) as $name => $stateIds){
foreach(Utils::stringifyKeys($table) as $name => $stateIds){
if(count($stateIds) === 1){
$this->nameToSingleNetworkIdLookup[$name] = $stateIds[array_key_first($stateIds)];
unset($this->nameToNetworkIdsLookup[$name]);
$this->nameToNetworkIdsLookup[$name] = $stateIds[array_key_first($stateIds)];
}else{
$this->nameToNetworkIdsLookup[$name] = $stateIds;
}
}
}
@ -70,10 +68,11 @@ final class BlockStateLookupCache{
public function lookupStateId(BlockStateData $data) : ?int{
$name = $data->getName();
if(isset($this->nameToSingleNetworkIdLookup[$name])){
return $this->nameToSingleNetworkIdLookup[$name];
}
return $this->nameToNetworkIdsLookup[$name][BlockStateDictionaryEntry::encodeStateProperties($data->getStates())] ?? null;
$lookup = $this->nameToNetworkIdsLookup[$name] ?? null;
return match(true){
$lookup === null => null,
is_int($lookup) => $lookup,
is_array($lookup) => $lookup[BlockStateDictionaryEntry::encodeStateProperties($data->getStates())] ?? null
};
}
}