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

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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
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3
Userland/Libraries/LibJS/Bytecode/Executable.h
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@ -9,6 +9,7 @@
#include <AK/FlyString.h>
#include <AK/NonnullOwnPtrVector.h>
#include <LibJS/Bytecode/BasicBlock.h>
#include <LibJS/Bytecode/IdentifierTable.h>
#include <LibJS/Bytecode/StringTable.h>
namespace JS::Bytecode {
@ -17,9 +18,11 @@ struct Executable {
FlyString name;
NonnullOwnPtrVector<BasicBlock> basic_blocks;
NonnullOwnPtr<StringTable> string_table;
NonnullOwnPtr<IdentifierTable> identifier_table;
size_t number_of_registers { 0 };
String const& get_string(StringTableIndex index) const { return string_table->get(index); }
FlyString const& get_identifier(IdentifierTableIndex index) const { return identifier_table->get(index); }
void dump() const;
};