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perf(transformer): look up SymbolId for require only once (#6192)

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When inserting `var x = require('y');` statements in `ModuleImports`, look up the binding for `require` only once, rather than for each statement.
This commit is contained in:
overlookmotel 2024-10-01 08:41:45 +00:00
parent a7ed29e67a
commit da2b2a4060
1 changed files with 15 additions and 4 deletions
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19
crates/oxc_transformer/src/common/module_imports.rs
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@ -85,7 +85,14 @@ impl<'a, 'ctx> ModuleImports<'a, 'ctx> {
imports: &mut IndexMap<Atom<'a>, Vec<NamedImport<'a>>>,
ctx: &mut TraverseCtx<'a>,
) {
let stmts = imports.drain(..).map(|(source, names)| Self::get_require(source, names, ctx));
if imports.is_empty() {
return;
}
let require_symbol_id = ctx.scopes().get_root_binding("require");
let stmts = imports
.drain(..)
.map(|(source, names)| Self::get_require(source, names, require_symbol_id, ctx));
self.ctx.top_level_statements.insert_statements(stmts);
}
@ -116,12 +123,16 @@ impl<'a, 'ctx> ModuleImports<'a, 'ctx> {
fn get_require(
source: Atom<'a>,
names: std::vec::Vec<NamedImport<'a>>,
require_symbol_id: Option<SymbolId>,
ctx: &mut TraverseCtx<'a>,
) -> Statement<'a> {
let var_kind = VariableDeclarationKind::Var;
let symbol_id = ctx.scopes().get_root_binding("require");
let ident =
ctx.create_reference_id(SPAN, Atom::from("require"), symbol_id, ReferenceFlags::read());
let ident = ctx.create_reference_id(
SPAN,
Atom::from("require"),
require_symbol_id,
ReferenceFlags::read(),
);
let callee = ctx.ast.expression_from_identifier_reference(ident);
let args = {