dash

Then consider posix_spawn(), since it pays that cost, but then we have to pay IPC as well: fasthttp(go) can do around 80k/sec on my laptop; dash(C) can do almost 88k/sec on my laptop†. As soon as dash does IPC, it drops to around 51k/sec, and as soon as it needs a reply, we're down to 25k/sec††. I see no reason to believe fasthttp would do any faster. That means I'm spending around 70% of my time in IPC -- something posix_spawn() would let me avoid (if my application were designed to do so). My same laptop will do 100k/sec posix_spawn() so I'd find this difficult to believe (1-4 msec per call) fork() or exec() is the bottleneck for any application with this architecture. Do you think posix_spawn() represents 70% of your costs? If our goal is to beat 51k/sec requests, sure, but NodeJS on my laptop (btw) gets 10k/sec, so if it's a contender