One bright point here is that the WASM changes may force v8 to improve its IPC by having a feature that Bun gets from JSC, which is passing strings across isolate boundaries.

IPC overhead is so bad in NodeJS that most people don’t talk about it because the workarounds are just impossibly high maintenance. We reach straight for RPC instead, and downplay the stupidity of the entire situation. Kind of reminiscent of the Ruby community, which is perhaps not surprising given the pedigree of so many important node modules (written by ex Rails devs).