[eknkc]

Likely because they are compiling Java with WasmGC extensions and stuff. If you try C, Rust, Zig etc they tend to run extremely fast in WASM.

Go also has a WASM target which runs pretty slow compared to its native binaries. GC extensions might help but as far as I can remember, Go's memory model does not fit the WasmGC so it might never be implemented.

[tracker1]

I'm somewhat curious why they even chose Java over Rust or Zig, considering the spreadsheet data paths should be relatively straight forward even with a lot of clone() activity.

[michaelothomas]

The calculation engine was written in Java before Rust or Zig were invented.

[tracker1]

Gotcha, I made the mistaken assumption this was a rewrite.