Live TV stream, playback delay

[zhshs]

Loading or switching m3u8 streams is very slow. What should we do to speed up loading ？How do I set up the player？
Libvlc Android version 3.49,

Here are links to several test programs
https://devstreaming-cdn.apple.com/vide ... riant.m3u8
https://devstreaming-cdn.apple.com/vide ... riant.m3u8
https://devstreaming-cdn.apple.com/vide ... aster.m3u8
https://devstreaming-cdn.apple.com/vide ... aster.m3u8
https://devstreaming-cdn.apple.com/vide ... index.m3u8
https://devstreaming-cdn.apple.com/vide ... index.m3u8