This is the most common report in the Kodi buffering IPTV threads: the same playlist runs smoothly in a dedicated player and stutters in Kodi. The reason is structural. Kodi's PVR path for a plain M3U hands live streams to a demuxer that makes very little attempt to fetch ahead, and there is no pause or timeshift to build a reserve against. A dedicated player typically holds a few seconds of the stream before showing anything. Kodi tries to play more or less instantly, so any delivery hiccup is on screen immediately. Nothing you set in the cache section will change that behavior for a plain live playlist.

Mostly not, which is why so many people report editing advancedsettings.xml and seeing no change at all. The memorysize and readfactor values govern buffering for network file playback, and community reports are consistent that they are disregarded for M3U live streams. From Kodi 21 onward the same controls moved into the interface, so you no longer need the file, but moving a setting into a menu does not extend its reach. If you have already spent an evening tuning cache values, stop. The productive change is which input stream handles the playlist, not how large a cache you asked Kodi to allocate.

1. 1advancedsettings.xml cache: file playback, not live M3U
2. 2Kodi 21 moved the same controls into the interface
3. 3Per-entry directive #EXTVLCOPT:network-caching=2000 adds ~2 seconds

A full playlist and its guide are loaded and held in memory. Once the visible channel count climbs past roughly 18,000, players become unstable, zapping slows, the guide takes many seconds to draw, and playback stutters that have nothing to do with your connection start appearing. Hiding groups you never watch is therefore a genuine performance fix rather than tidying. Cut the visible list to the groups you actually use, and reduce how many days of guide data Kodi imports. On low-power boxes this single change often does more than every network adjustment combined, because you are removing work from a device that had none to spare.

1. 1Hide unused groups in the PVR client
2. 2Reduce imported guide days
3. 3Re-import the playlist after trimming, do not just refresh

If one channel group stalls and the rest of the list is clean, the fault is on a server upstream and no Kodi setting exists that will fix it. The same is true of buffering that appears only between roughly 7pm and 10pm and disappears at dawn, which is capacity contention rather than configuration. Conceding this is not a dodge, it is the point at which the question changes from what should I set to what uptime does this service actually publish. Ours is 99.99%, about 53 minutes of downtime across a year, and a $5 24-hour trial lets you watch one peak evening through Kodi before deciding.