diff --git a/crates/swc_ecma_parser/src/parser/expr.rs b/crates/swc_ecma_parser/src/parser/expr.rs
index 62986026b298..0689f2c4806a 100644
--- a/crates/swc_ecma_parser/src/parser/expr.rs
+++ b/crates/swc_ecma_parser/src/parser/expr.rs
@@ -712,7 +712,7 @@ impl<I: Tokens> Parser<I> {
             expect!(p, '(');
 
             let mut first = true;
-            let mut expr_or_spreads = Vec::with_capacity(8);
+            let mut expr_or_spreads = Vec::with_capacity(2);
 
             while !eof!(p) && !is!(p, ')') {
                 if first {