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⚡ Bolt: 셀 렌더링 내부 요소의 DOM 할당 최적화 #333

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⚡ Bolt: 셀 렌더링 내부 요소의 DOM 할당 최적화 #333

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3 changes: 3 additions & 0 deletions .jules/bolt.md
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Original file line number Diff line number Diff line change
Expand Up @@ -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.
## 2026-07-18 - Optimize inner cell DOM allocations
**Learning:** Template caching is effective not just for parent rows/cells, but also for small inner elements (badges, labels) generated repeatedly inside O(N) loops.
**Action:** Extend cloneNode optimizations to all repeatedly created elements inside hot paths, even simple spans and labels.
31 changes: 25 additions & 6 deletions app.js
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Expand Up @@ -952,6 +952,7 @@ function createWarningBadge(warning) {

const persistentOwnerColorMap = new Map();

let ownerBadgeTemplate = null;
function createOwnerCellContent(owner) {
if (!owner) {
return createEmptyCell();
Expand All @@ -961,18 +962,26 @@ function createOwnerCellContent(owner) {
persistentOwnerColorMap.set(owner, OWNER_COLORS[persistentOwnerColorMap.size % OWNER_COLORS.length]);
}

const badge = document.createElement('span');
badge.className = 'owner-badge';
if (!ownerBadgeTemplate) {
ownerBadgeTemplate = document.createElement('span');
ownerBadgeTemplate.className = 'owner-badge';
}

const badge = ownerBadgeTemplate.cloneNode(false);
badge.style.background = persistentOwnerColorMap.get(owner);
badge.textContent = owner;
return badge;
}

let statusBadgeTemplate = null;
function createStatusCellContent(progressState) {
if (!progressState.label) {
return createEmptyCell();
}
const badge = document.createElement('span');
if (!statusBadgeTemplate) {
statusBadgeTemplate = document.createElement('span');
}
const badge = statusBadgeTemplate.cloneNode(false);
badge.className = `status-badge ${progressState.className}`;
badge.textContent = progressState.label;
if (progressState.description) {
Expand All @@ -993,12 +1002,22 @@ function createMetricText(value, testId = '') {
return metric;
}

let actualProgressLabelTemplate = null;
let actualProgressSrOnlyTemplate = null;

function createActualProgressCellContent(task, taskMetrics) {
const label = document.createElement('label');
if (!actualProgressLabelTemplate) {
actualProgressLabelTemplate = document.createElement('label');
}
if (!actualProgressSrOnlyTemplate) {
actualProgressSrOnlyTemplate = document.createElement('span');
actualProgressSrOnlyTemplate.className = 'sr-only';
}

const label = actualProgressLabelTemplate.cloneNode(false);
const fieldId = `actual-progress-${task.id}`;
label.htmlFor = fieldId;
const srOnly = document.createElement('span');
srOnly.className = 'sr-only';
const srOnly = actualProgressSrOnlyTemplate.cloneNode(false);
const rowEntityName = task.task || task.activity || task.phase || '작업';
srOnly.textContent = `실적진척상태 - ${rowEntityName}`;
if (!actualProgressSelectTemplate) {
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