From 16f129c530cd32057195180180ea29824fc7045b Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Thu, 27 Aug 2026 21:33:40 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
=?UTF-8?q?=EA=B0=9C=EC=84=A0]=20String.padStart=EB=A5=BC=20=EC=9D=B8?=
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- `app.js`의 `formatDateInput`, `formatLocalDateInput`, `formatCompactDate` 함수에서 `String.padStart()` 사용 제거
- 핫 루프(Hot loop)에서 불필요한 문자열 할당 및 JS-to-C++ 오버헤드를 방지하기 위해 인라인 삼항 연산자 문자열 연결로 대체
- `index.html` 모듈 프리로드 최적화 복구 포함
---
.jules/bolt.md | 3 +++
app.js | 19 ++++++++++++-------
index.html | 2 ++
3 files changed, 17 insertions(+), 7 deletions(-)
diff --git a/.jules/bolt.md b/.jules/bolt.md
index b08b203a..d45b3898 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -4,3 +4,6 @@
## 2026-07-12 - Optimize renderTaskRow DOM allocations
**Learning:** Caching unattached template nodes and instantiating them via `.cloneNode(false)` reduces DOM instantiation overhead in O(N) render loops significantly.
**Action:** Apply this optimization to other hot-path rendering elements such as rows, cells, and stack containers.
+## 2023-10-27 - [Avoid String.padStart in Hot Loops]
+**Learning:** `String.padStart()` introduces unnecessary string allocations and JS-to-C++ context switching overhead in tight rendering loops like date formatters.
+**Action:** Prefer using inline ternary string concatenation (e.g., `m < 10 ? '0' + m : m`) instead of `String.prototype.padStart()` for dynamic string padding in hot paths to avoid JS-to-C++ overhead and improve performance.
diff --git a/app.js b/app.js
index a04aae71..6a005703 100644
--- a/app.js
+++ b/app.js
@@ -2682,22 +2682,27 @@ function clamp(value, min, max) {
return Math.min(max, Math.max(min, value));
}
+// ⚡ Bolt: Inline ternary string concatenation avoids String.padStart() overhead in hot loops
function formatDateInput(date) {
const year = date.getUTCFullYear();
- const month = String(date.getUTCMonth() + 1).padStart(2, '0');
- const day = String(date.getUTCDate()).padStart(2, '0');
- return `${year}-${month}-${day}`;
+ const m = date.getUTCMonth() + 1;
+ const d = date.getUTCDate();
+ return `${year}-${m < 10 ? '0' + m : m}-${d < 10 ? '0' + d : d}`;
}
+// ⚡ Bolt: Inline ternary string concatenation avoids String.padStart() overhead in hot loops
function formatLocalDateInput(date) {
const year = date.getFullYear();
- const month = String(date.getMonth() + 1).padStart(2, '0');
- const day = String(date.getDate()).padStart(2, '0');
- return `${year}-${month}-${day}`;
+ const m = date.getMonth() + 1;
+ const d = date.getDate();
+ return `${year}-${m < 10 ? '0' + m : m}-${d < 10 ? '0' + d : d}`;
}
+// ⚡ Bolt: Inline ternary string concatenation avoids String.padStart() overhead in hot loops
function formatCompactDate(date) {
- return `${date.getFullYear()}${String(date.getMonth() + 1).padStart(2, '0')}${String(date.getDate()).padStart(2, '0')}`;
+ const m = date.getMonth() + 1;
+ const d = date.getDate();
+ return `${date.getFullYear()}${m < 10 ? '0' + m : m}${d < 10 ? '0' + d : d}`;
}
function formatPercent(value, digits) {
diff --git a/index.html b/index.html
index d24b2a88..879ad03b 100644
--- a/index.html
+++ b/index.html
@@ -7,6 +7,8 @@
ScopeWeave Planner
+
+