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Reduce overhead of Engine by not creating hash maps until used.

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This commit is contained in:
Stephen Chung
2020-04-04 13:05:20 +08:00
parent 12a379dd57
commit d1cffac420
3 changed files with 160 additions and 90 deletions
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8
src/optimize.rs
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@@ -451,9 +451,11 @@ fn optimize_expr<'a>(expr: Expr, state: &mut State<'a>) -> Expr {
&& args.iter().all(|expr| expr.is_constant()) // all arguments are constants
=> {
// First search in script-defined functions (can override built-in)
if state.engine.fn_lib.has_function(&id, args.len()) {
// A script-defined function overrides the built-in function - do not make the call
return Expr::FunctionCall(id, args.into_iter().map(|a| optimize_expr(a, state)).collect(), def_value, pos);
if let Some(ref fn_lib) = state.engine.fn_lib {
if fn_lib.has_function(&id, args.len()) {
// A script-defined function overrides the built-in function - do not make the call
return Expr::FunctionCall(id, args.into_iter().map(|a| optimize_expr(a, state)).collect(), def_value, pos);
}
}
let mut arg_values: Vec<_> = args.iter().map(Expr::get_constant_value).collect();