perf(minifier): preallocate stmts vec size to avoid excesive reallocs (#26856)

preallocate the output vector with `stmts.len()` capacity instead of
starting from empty, since minimize_statements predominantly
removes/collapses statements.

crates/oxc_minifier/src/peephole/minimize_statements.rs

@@ -50,7 +50,8 @@ impl<'a> PeepholeOptimizations {
     /// ## MinimizeExitPoints:
     /// <https://github.com/google/closure-compiler/blob/v20240609/src/com/google/javascript/jscomp/MinimizeExitPoints.java>
     pub fn minimize_statements(stmts: &mut ArenaVec<'a, Statement<'a>>, ctx: &mut TraverseCtx<'a>) {
-        let mut old_stmts = stmts.take_in(ctx).into_iter();
+        let dummy = ArenaVec::with_capacity_in(stmts.len(), ctx);
+        let mut old_stmts = std::mem::replace(stmts, dummy).into_iter();
         let mut is_control_flow_dead = false;
         let mut keep_var = KeepVar::new();
         let mut identity_drops = 0u32;

tasks/track_memory_allocations/allocs_minifier.yaml

@@ -6,8 +6,8 @@ checker.ts:
   sys alloc bytes: 14996632 # 15.00 MB
   sys peak growth: 10169560 # 10.17 MB
   arena allocs: 56226
-  arena reallocs: 21411
-  arena size: 16507656 # 16.51 MB
+  arena reallocs: 5084
+  arena size: 16317704 # 16.32 MB
 
 App.tsx:
   file size: 415342 # 415.34 kB
@@ -17,8 +17,8 @@ App.tsx:
   sys alloc bytes: 2128563 # 2.13 MB
   sys peak growth: 1612427 # 1.61 MB
   arena allocs: 7489
-  arena reallocs: 2709
-  arena size: 2704912 # 2.70 MB
+  arena reallocs: 920
+  arena size: 2684576 # 2.68 MB
 
 RadixUIAdoptionSection.jsx:
   file size: 2520 # 2.52 kB
@@ -28,7 +28,7 @@ RadixUIAdoptionSection.jsx:
   sys alloc bytes: 17400 # 17.40 kB
   sys peak growth: 11628 # 11.63 kB
   arena allocs: 16
-  arena reallocs: 6
+  arena reallocs: 0
   arena size: 35224 # 35.22 kB
 
 pdf.mjs:
@@ -39,8 +39,8 @@ pdf.mjs:
   sys alloc bytes: 5316219 # 5.32 MB
   sys peak growth: 3693363 # 3.69 MB
   arena allocs: 19526
-  arena reallocs: 7696
-  arena size: 5757664 # 5.76 MB
+  arena reallocs: 2574
+  arena size: 5708896 # 5.71 MB
 
 antd.js:
   file size: 6686316 # 6.69 MB
@@ -49,9 +49,9 @@ antd.js:
   sys deallocs: 860
   sys alloc bytes: 29976375 # 29.98 MB
   sys peak growth: 19934749 # 19.93 MB
-  arena allocs: 181720
-  arena reallocs: 63323
-  arena size: 43279864 # 43.28 MB
+  arena allocs: 181721
+  arena reallocs: 34406
+  arena size: 43045192 # 43.05 MB
 
 binder.ts:
   file size: 193077 # 193.08 kB
@@ -61,8 +61,8 @@ binder.ts:
   sys alloc bytes: 963032 # 963.03 kB
   sys peak growth: 657404 # 657.40 kB
   arena allocs: 2923
-  arena reallocs: 834
-  arena size: 1077056 # 1.08 MB
+  arena reallocs: 244
+  arena size: 1075024 # 1.08 MB
 
 kitchen-sink.tsx:
   file size: 732898 # 732.90 kB
@@ -71,6 +71,6 @@ kitchen-sink.tsx:
   sys deallocs: 1854
   sys alloc bytes: 5304692 # 5.30 MB
   sys peak growth: 3707457 # 3.71 MB
-  arena allocs: 31143
-  arena reallocs: 12185
-  arena size: 8673608 # 8.67 MB
+  arena allocs: 31159
+  arena reallocs: 3012
+  arena size: 8444408 # 8.44 MB