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perf(explore): reduce tag cloud refresh pressure
github/actions/ci GitHub Actions CI finished: success
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Debounce Explore tag refreshes while AI tagging is active so the tag cloud catches up after worker activity settles instead of continuously re-querying.

Optimize the tag cloud aggregate query by fetching representative thumbnails in one pass and adding a supporting tag/image index.
This commit is contained in:
LyAhn
2026-07-03 19:32:37 +01:00
parent fe65bc6f38
commit 3ab9357d6f
3 changed files with 85 additions and 26 deletions
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src-tauri/src/db.rs
+27 -16
View File
@@ -303,6 +303,7 @@ pub fn migrate(conn: &Connection) -> Result<()> {
CREATE INDEX IF NOT EXISTS idx_image_tags_image_id ON image_tags(image_id);
CREATE INDEX IF NOT EXISTS idx_image_tags_source ON image_tags(source);
CREATE INDEX IF NOT EXISTS idx_image_tags_tag ON image_tags(tag);
CREATE INDEX IF NOT EXISTS idx_image_tags_tag_image_id ON image_tags(tag, image_id);
CREATE TABLE IF NOT EXISTS albums (
id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -2446,32 +2447,42 @@ pub fn get_explore_tags(
limit: usize,
) -> Result<Vec<ExploreTagEntry>> {
let mut stmt = conn.prepare(
"SELECT t.tag, COUNT(DISTINCT t.image_id) AS tag_count, MIN(t.image_id) AS representative_image_id,
MAX(CASE WHEN t.source = 'ai' THEN 1 ELSE 0 END) AS has_ai_source,
MAX(CASE WHEN t.source = 'user' THEN 1 ELSE 0 END) AS has_user_source
FROM image_tags t
JOIN images i ON i.id = t.image_id
WHERE (?1 IS NULL OR i.folder_id = ?1)
GROUP BY t.tag
HAVING COUNT(DISTINCT t.image_id) >= 1
ORDER BY tag_count DESC, t.tag ASC
LIMIT ?2",
"WITH tag_counts AS (
SELECT t.tag,
COUNT(DISTINCT t.image_id) AS tag_count,
MIN(t.image_id) AS representative_image_id,
MAX(CASE WHEN t.source = 'ai' THEN 1 ELSE 0 END) AS has_ai_source,
MAX(CASE WHEN t.source = 'user' THEN 1 ELSE 0 END) AS has_user_source
FROM image_tags t
JOIN images i ON i.id = t.image_id
WHERE (?1 IS NULL OR i.folder_id = ?1)
GROUP BY t.tag
HAVING COUNT(DISTINCT t.image_id) >= 1
ORDER BY tag_count DESC, t.tag ASC
LIMIT ?2
)
SELECT c.tag,
c.tag_count,
c.representative_image_id,
i.thumbnail_path,
c.has_ai_source,
c.has_user_source
FROM tag_counts c
JOIN images i ON i.id = c.representative_image_id
ORDER BY c.tag_count DESC, c.tag ASC",
)?;
let rows = stmt
.query_map(params![folder_id, limit as i64], |row| {
let representative_image_id = row.get::<_, i64>(2)?;
let thumbnail_path = get_image_by_id(conn, representative_image_id)
.ok()
.and_then(|image| image.thumbnail_path);
Ok(ExploreTagEntry {
tag: row.get(0)?,
count: row.get(1)?,
representative_image_id,
thumbnail_path,
has_ai_source: row.get::<_, i64>(3)? != 0,
has_user_source: row.get::<_, i64>(4)? != 0,
thumbnail_path: row.get(3)?,
has_ai_source: row.get::<_, i64>(4)? != 0,
has_user_source: row.get::<_, i64>(5)? != 0,
})
})?
.collect::<rusqlite::Result<Vec<_>>>()?;