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refactor(handler): delay store.UserByID as much as possible

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In internal/reader/handler/handler.go:RefreshFeed, there is a call to
store.UserByID pretty early, which is only used for
originalFeed.WithTranslatedErrorMessage(localizedError.Translate(user.Language)
Its only other usage is in processor.ProcessFeedEntries(store, originalFeed,
user, forceRefresh), which is pretty late in RefreshFeed, and only called if
there are new items in the feed. It makes sense to only fetch the user's
language if the error localization function is used.

Calls to `store.UserByID` take around 10% of the CPU time of RefreshFeed in my
profiling.

This commit also makes `processor.ProcessFeedEntries` take a `userID` instead
of a `user`, to make the code a bit more concise.

This should close #2984
This commit is contained in:
Julien Voisin 2024-12-10 03:32:59 +00:00 • committed by GitHub
parent 02c6d14659
commit 637fb85de0
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2 changed files with 30 additions and 19 deletions
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8
internal/reader/processor/processor.go
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@ -28,9 +28,15 @@ import (
var customReplaceRuleRegex = regexp.MustCompile(`rewrite\("([^"]+)"\|"([^"]+)"\)`)
// ProcessFeedEntries downloads original web page for entries and apply filters.
func ProcessFeedEntries(store *storage.Storage, feed *model.Feed, user *model.User, forceRefresh bool) {
func ProcessFeedEntries(store *storage.Storage, feed *model.Feed, userID int64, forceRefresh bool) {
var filteredEntries model.Entries
user, storeErr := store.UserByID(userID)
if storeErr != nil {
slog.Error("Database error", slog.Any("error", storeErr))
return
}
// Process older entries first
for i := len(feed.Entries) - 1; i >= 0; i-- {
entry := feed.Entries[i]