RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 05:38:11 +00:00
Code Issues Activity Actions

LibJS: Add a separate "identifier table" to bytecode executables

Browse source 
This is a specialized string table for storing identifiers only.
Identifiers are always FlyStrings, which makes many common operations
faster by allowing O(1) comparison.
This commit is contained in:
Andreas Kling 2021-10-24 15:34:30 +02:00
parent 13f04e37e5
commit da98212001
10 changed files with 121 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

33
Userland/Libraries/LibJS/Bytecode/IdentifierTable.cpp Normal file
View file

@ -0,0 +1,33 @@
/*
* Copyright (c) 2021, Gunnar Beutner <gbeutner@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Bytecode/IdentifierTable.h>
namespace JS::Bytecode {
IdentifierTableIndex IdentifierTable::insert(FlyString string)
{
for (size_t i = 0; i < m_identifiers.size(); i++) {
if (m_identifiers[i] == string)
return i;
}
m_identifiers.append(move(string));
return m_identifiers.size() - 1;
}
FlyString const& IdentifierTable::get(IdentifierTableIndex index) const
{
return m_identifiers[index.value()];
}
void IdentifierTable::dump() const
{
outln("Identifier Table:");
for (size_t i = 0; i < m_identifiers.size(); i++)
outln("{}: {}", i, m_identifiers[i]);
}
}