It's "acceptable-throughput" for that use case, and you can balance the tradeoffs of compilation time to optimisation (for time or code size) by adding -On para

It's "acceptable-throughput" for that use case, and you can balance the tradeoffs of compilation time to optimisation (for time or code size) by adding -On parameters. That's a very different kind of throughput to "compile small functions many times per second".