Depends. Doesn't seem much for a server but if you want to distribute an executable to your users then 90MB seems huge. IIRC a hello world Go binary is like 2MB.
The question is "how fast". If bun executables are always 45x go's that's a problem. If they are always 98mb more than go's, then it's less of a problem as the size grows.
A car that can transport 7 people is not 3.5x heavier than a car that can only have place for two — the initial size is much bigger, additional js code won’t bloat it further that much.