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perf(workspace): optimize sheet title caching to reduce string allocations

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Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>
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google-labs-jules[bot] 2026-08-26 14:09:14 +00:00
parent 37cfd2144b
commit c10a13f226
1 changed files with 9 additions and 2 deletions
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11
src/workspace.ts
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@ -29,6 +29,7 @@ export class Workspace {
private resolving: Set<string> = new Set();
private parsedRefsCache = new Map<string, { text: string; refs: string[] }>();
private titleCache: Map<string, SheetSource> | null = null;
private lowerTitleCache = new Map<string, string>();
constructor(private engine: SumEngine, private sheets: () => SheetSource[]) {}
@ -115,8 +116,14 @@ export class Workspace {
const needle = title.trim().toLowerCase();
if (this.titleCache === null) {
this.titleCache = new Map();
for (const s of this.sheets()) {
const key = s.title.trim().toLowerCase();
const currentSheets = this.sheets();
for (let i = 0, len = currentSheets.length; i < len; i++) {
const s = currentSheets[i];
let key = this.lowerTitleCache.get(s.title);
if (key === undefined) {
key = s.title.trim().toLowerCase();
this.lowerTitleCache.set(s.title, key);
}
if (!this.titleCache.has(key)) {
this.titleCache.set(key, s);
}