Hacker News Reader

That is an option, or if you don't want to deal with a GC because it's eating 70% of your clock cycles under load you can use rust get performance gains and still be writing safe code...

View on HN

if your GC eats 70% is your clock cycles, your language has a broken GC. in modern Java/C#, GC time is rarely more than 10%

To get to a low GC overhead in Java (and perhaps other languages too) you have to pay with an increase in memory consumption. Sometimes as much as 100% additional RAM to avoid frequent full GC scans.

That's true, but malloc/free based systems also have a relatively high memory overhead due to fragmentation and programmers being worse at inserting frees than the GC. It's not at all clear that the C/C++ model of memory management has lower than 100% overhead for long running programs.

> but malloc/free based systems also have a relatively high memory overhead due to fragmentation

In case you haven't seen it, there's been some interesting progress on that front:

https://www.youtube.com/watch?v=c1UBJbfR-H0

Reply on news.ycombinator.com