obsidian-plugin/wenlzhang_obsidian-tag-index
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perf: optimize tag frequency calculation using Obsidian's built-in cache API

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wz 2025-10-03 23:57:57 +02:00
parent eec23a42c5
commit a35774d440
1 changed files with 17 additions and 37 deletions
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54
src/tagIndexView.ts
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@ -232,10 +232,16 @@ export class TagIndexView extends ItemView {
}
// Calculate frequencies for frequency-based sorting
// Get all tag counts once from Obsidian's cache (very efficient)
const frequencies = new Map<string, number>();
if (method === "frequency-high" || method === "frequency-low") {
const allTagCounts = (this.app.metadataCache as any).getTags();
tags.forEach((tag) => {
const count = this.getTagFrequency(tag.name);
const normalizedTagName = tag.name.startsWith("#")
? tag.name
: `#${tag.name}`;
const count = allTagCounts[normalizedTagName] || 0;
frequencies.set(tag.name, count);
});
}
@ -307,44 +313,18 @@ export class TagIndexView extends ItemView {
}
private getTagFrequency(tagName: string): number {
const tagNameWithoutHash = tagName.startsWith("#")
? tagName.substring(1)
: tagName;
// Use Obsidian's built-in MetadataCache API for efficient tag counting
// This is much faster than manually scanning all files
const allTagCounts = (this.app.metadataCache as any).getTags();
// Count files that contain this tag
const count = this.app.vault
.getMarkdownFiles()
.filter((file: TFile) => {
const cache = this.app.metadataCache.getFileCache(file);
if (!cache) return false;
// Normalize tag name to ensure it has # prefix for lookup
const normalizedTagName = tagName.startsWith("#")
? tagName
: `#${tagName}`;
// Check inline tags
if (cache.tags) {
const hasInlineTag = cache.tags.some(
(tagCache) => tagCache.tag === `#${tagNameWithoutHash}`,
);
if (hasInlineTag) return true;
}
// Check frontmatter tags
if (cache.frontmatter && cache.frontmatter.tags) {
const frontmatterTags = cache.frontmatter.tags;
if (Array.isArray(frontmatterTags)) {
return frontmatterTags.some(
(tag) => tag === tagNameWithoutHash,
);
} else if (typeof frontmatterTags === "string") {
return frontmatterTags
.split(",")
.map((t) => t.trim())
.includes(tagNameWithoutHash);
}
}
return false;
}).length;
return count;
// getTags() returns an object like: { "#tag1": 5, "#tag2": 3, ... }
// where the number is how many files contain that tag
return allTagCounts[normalizedTagName] || 0;
}
private buildTree(tags?: ImportantTag[]): Map<string, TreeNode> {