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4grayandClaude Opus 4.7
6303986c72
The three channel-list views (all-channels, groups, favorites) each had
an enrichedXxx computed signal that, on every progressTick (~30 s),
spread-cloned every channel in scope to attach { epgProgram, logo,
progressPercentage }. On a 90 K-channel M3U playlist, all-channels-view
allocated ~90 K objects per tick — persistent young-gen pressure and
visible GC stutter on large lists.
Replace the pattern with a side-car ChannelEpgMetadata map keyed by EPG
lookup key, holding only entries for channels that actually have EPG
data (typically a small fraction of the playlist). Templates iterate
the raw channel array and look up { epgProgram, progressPercentage }
inline. Logo resolution moves to a per-row method call — under OnPush
+ virtual scroll only ~50 visible rows check at a time.
groups-view's selectedGroupChannels also lost its progressTick
dependency: sorting + filtering only reruns when the selected group or
sort mode changes, no longer every 30 s.
The EnrichedChannel interface is replaced with a smaller
ChannelEpgMetadata. Specs that asserted on the cloned `.logo` field now
call `getLogoForChannel(channel)`.
Inspired by matracey/iptvnator@8d78cc0, @b9e6e82, @296d61e — ported as
a single coherent change. Their version missed our second site
(selectedGroupChannels) and didn't address the per-tick logo cloning.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Entire-Checkpoint: e400bd558b10