Version: 1.18.2 fabric
Chunk sending: https://www.curseforge.com/minecraft/mc-mods/chunk-sending-forge-fabric
Smooth Chunk Save: https://www.curseforge.com/minecraft/mc-mods/smooth-chunk-save
Chunk Sending limits the amount of chunk sent per tick, provides better latency after respawning or teleporting.
Smooth Chunk Save makes chunk being saved continuously, decreasing lag spikes produced by chunk saving.
C2ME works with these two mods, but I didn't notice performance decrease after removing them. So I was wondering if C2ME works well with these mods or acts as an alternative.

C2ME works with these two mods, but I didn't notice performance decrease after removing them. So I was wondering if C2ME works well with these mods or acts as an alternative.

Did you mean performance increase?

Also C2ME already includes the functionality of Smooth Chunk Save (c29138c, which is 20 days before Smooth Chunk Save became a thing), but not the chunk sending mod.

As for Smooth Chunk Save, it is not a good combination because it duplicates chunk saving when combined with C2ME.
Also, regardless whether C2ME is installed:

• it puts your server at risk of large rollbacks if the MSPT goes higher than 50 as it disable periodic auto-saving.
• it disables saving on game menu in singleplayer

As for the chunk sending mod, it is probably fine when combined with C2ME.
If your real goal is improving multiplayer experience, it might be worth checking out Raknetify.

ye, I'm not sure if that's a good combination

Thanks! I'm actually optimizing my modpack, and this mod is the last piece of the puzzle that makes chunk generation smooth.