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Use more compact keys in PDFLinkService._pagesRefCache

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By using the same internal formatting here as in the `Ref.toString` method, in `src/core/primitives.js`, all cache-keys will become at least two bytes shorter (and most three bytes shorter).
Obviously this won't have a huge effect on memory since there's only one cache entry per page, but it nonetheless seems wasteful to use longer keys than strictly required.
This commit is contained in:
Jonas Jenwald 2019-08-05 17:56:09 +02:00
parent be70ee236d
commit 9acaaf5126
1 changed files with 4 additions and 2 deletions
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6
web/pdf_link_service.js
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@ -344,12 +344,14 @@ class PDFLinkService {
if (!pageRef) { if (!pageRef) {
return; return;
} }
let refStr = pageRef.num + ' ' + pageRef.gen + ' R'; const refStr = pageRef.gen === 0 ? `${pageRef.num}R` :
`${pageRef.num}R${pageRef.gen}`;
this._pagesRefCache[refStr] = pageNum; this._pagesRefCache[refStr] = pageNum;
} }
_cachedPageNumber(pageRef) { _cachedPageNumber(pageRef) {
let refStr = pageRef.num + ' ' + pageRef.gen + ' R'; const refStr = pageRef.gen === 0 ? `${pageRef.num}R` :
`${pageRef.num}R${pageRef.gen}`;
return (this._pagesRefCache && this._pagesRefCache[refStr]) || null; return (this._pagesRefCache && this._pagesRefCache[refStr]) || null;
} }