Sometimes GCs require a lot of tuning, but I'd bet that 90% of software written in GC'd languages works just fine, without touching the GC settings. In my limi

Sometimes GCs require a lot of tuning, but I'd bet that 90% of software written in GC'd languages works just fine, without touching the GC settings. In my limited experience writing performance-critical Python code the improvements always came from choosing better libraries (eg for faster serializations) or improving our own code. The GC never showed up in profiling as an issue for us.