From 3d648003ecc6b69085ebc9498975983060970632 Mon Sep 17 00:00:00 2001
From: OrcaWin <alpha-eng@stably.ai>
Date: Sat, 12 Sep 2026 18:10:40 -0700
Subject: [PATCH] perf: count chat tool calls without a filtered array (#20328)

Co-authored-by: Orca Worker <orca-worker@localhost>
---
 src/shared/native-chat-tool-summary.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/shared/native-chat-tool-summary.ts b/src/shared/native-chat-tool-summary.ts
index 60cd4ba9d53..38f02ee34f8 100644
--- a/src/shared/native-chat-tool-summary.ts
+++ b/src/shared/native-chat-tool-summary.ts
@@ -298,7 +298,13 @@ export function summarizeToolRun(blocks: readonly NativeChatBlock[]): string {
 }
 
 export function countToolCalls(blocks: readonly NativeChatBlock[]): number {
-  return blocks.filter(isToolCallBlock).length
+  let count = 0
+  blocks.forEach((block) => {
+    if (isToolCallBlock(block)) {
+      count += 1
+    }
+  })
+  return count
 }
 
 function toRawPreview(input: unknown): string {