Lomanic/cloudtube
1
0
Fork 0
mirror of https://git.sr.ht/~cadence/cloudtube synced 2024-11-21 23:27:30 +00:00
Code Issues Releases Wiki Activity

11x speed up of subscription page generation

Browse Source 
My 30 subscriptions now take 25 ms to generate, instead of around 280.

Around 120 ms were saved by creating a database index.
Around 120 ms were saved by pre-compiling the pug template for video
description timestamps.
The other changes in this commit produced slight improvements.
This commit is contained in:
Cadence Ember 2021-08-26 23:47:53 +12:00
parent 0aa0505009
commit 55065e2a9e
No known key found for this signature in database
GPG Key ID: BC1C2C61CF521B17
4 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
api/subscriptions.js
View File

@ -16,18 +16,15 @@ module.exports = [
// trigger a background refresh, needed if they came back from being inactive
refresher.skipWaiting()
// get channels
const subscriptions = user.getSubscriptions()
const template = Array(subscriptions.length).fill("?").join(", ")
channels = db.prepare(`SELECT * FROM Channels WHERE ucid IN (${template}) ORDER BY name`).all(subscriptions)
channels = db.prepare(`SELECT Channels.* FROM Channels INNER JOIN Subscriptions ON Channels.ucid = Subscriptions.ucid WHERE token = ? ORDER BY name`).all(user.token)
// get refreshed status
refreshed = db.prepare(`SELECT min(refreshed) as min, max(refreshed) as max, count(refreshed) as count FROM Channels WHERE ucid IN (${template})`).get(subscriptions)
refreshed = db.prepare(`SELECT min(refreshed) as min, max(refreshed) as max, count(refreshed) as count FROM Channels INNER JOIN Subscriptions ON Channels.ucid = Subscriptions.ucid WHERE token = ?`).get(user.token)
// get watched videos
const watchedVideos = user.getWatchedVideos()
// get videos
if (subscriptions.length) {
if (channels.length) {
hasSubscriptions = true
const template = Array(subscriptions.length).fill("?").join(", ")
videos = db.prepare(`SELECT * FROM Videos WHERE authorId IN (${template}) ORDER BY published DESC LIMIT 60`).all(subscriptions)
videos = db.prepare(`SELECT Videos.* FROM Videos INNER JOIN Subscriptions ON Videos.authorID = Subscriptions.ucid WHERE token = ? ORDER BY published DESC LIMIT 60`).all(user.token)
.map(video => {
video.publishedText = timeToPastText(video.published * 1000)
video.watched = watchedVideos.includes(video.videoId)

3
utils/converters.js
View File

@ -58,6 +58,7 @@ function normaliseVideoInfo(video) {
}
}
const timeDisplayCompiled = pug.compile(`a(href=url data-clickable-timestamp=timeSeconds)= timeDisplay`)
function rewriteVideoDescription(descriptionHtml, id) {
// replace timestamps to clickable links and rewrite youtube links to stay on the instance instead of pointing to YouTube
// test cases
@ -93,7 +94,7 @@ function rewriteVideoDescription(descriptionHtml, id) {
params.set("t", timeURL)
const url = "/watch?" + params
return pug.render(`a(href=url data-clickable-timestamp=timeSeconds)= timeDisplay`, {url, timeURL, timeDisplay, timeSeconds})
return timeDisplayCompiled({url, timeURL, timeDisplay, timeSeconds})
})
return descriptionHtml

5
utils/getuser.js
View File

@ -14,7 +14,10 @@ function getToken(req, responseHeaders) {
return null
}
}
db.prepare("REPLACE INTO SeenTokens (token, seen) VALUES (?, ?)").run([token, Date.now()])
db.prepare(
"INSERT INTO SeenTokens (token, seen) VALUES (?, ?)"
+ " ON CONFLICT (token) DO UPDATE SET seen = excluded.seen"
).run([token, Date.now()])
return token
}

5
utils/upgradedb.js
View File

@ -58,6 +58,11 @@ const deltas = [
function() {
db.prepare("ALTER TABLE Subscriptions ADD COLUMN channel_missing INTEGER DEFAULT 0")
.run()
},
// 9: add index Videos (authorID)
function() {
db.prepare("CREATE INDEX Videos_authorID ON Videos (authorID)")
.run()
}
]