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Further improve caching in Catalog.getPageDict, for disableAutoFetch mode (PR 8207 follow-up)

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PR 8207 added caching to improve the performance of `Catalog.getPageDict`, by not having to repeatedly fetch the same data and also reducing the asynchronicity of that method.
However, because of *another* oversight on my part, we're only caching /Page references once we've found the correct page. As long as all pages are loaded *in order* this doesn't really matter (happens by default in the viewer), but when `disableAutoFetch` is used the pages may be fetched in a more random order (this patch reduces the asynchronicity of `Catalog.getPageDict` slightly in that case).
This commit is contained in:
Jonas Jenwald 2021-12-09 12:35:44 +01:00
parent 97dc048e56
commit 8a05db230e
1 changed files with 7 additions and 6 deletions
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13
src/core/catalog.js
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@ -1117,13 +1117,14 @@ class Catalog {
xref.fetchAsync(currentNode).then(function (obj) {
if (isDict(obj, "Page") || (isDict(obj) && !obj.has("Kids"))) {
// Cache the Page reference, since it can *greatly* improve
// performance by reducing redundant lookups in long documents
// where all nodes are found at *one* level of the tree.
if (currentNode && !pageKidsCountCache.has(currentNode)) {
pageKidsCountCache.put(currentNode, 1);
}
if (pageIndex === currentPageIndex) {
// Cache the Page reference, since it can *greatly* improve
// performance by reducing redundant lookups in long documents
// where all nodes are found at *one* level of the tree.
if (currentNode && !pageKidsCountCache.has(currentNode)) {
pageKidsCountCache.put(currentNode, 1);
}
capability.resolve([obj, currentNode]);
} else {
currentPageIndex++;