6 ms·
That's because they used primitives, no? In that case also look at some other options: https://www.reddit.com/r/java/comments/r0b9o9/a_tale_of_java_hash_tables/
by JanecekPetr 5y ago
That's because they used primitives, no? In that case also look at some other options: https://www.reddit.com/r/java/comments/r0b9o9/a_tale_of_java_hash_tables/hlrs01u/?utm_source=reddit&utm_medium=web2x&context=3 https://www.reddit.com/r/java/comments/r0b9o9/a_tale_of_java.... While I still think Koloboke in general is the fastest, I do agree that the difference between it and fastutil will not be very big.
Or was this for Object/boxed primitives, too?
- willvarfar 5y agoIf you are working with primaries then the unboxed collections are a big boon. My code often uses objects though, so I use a lot of the fastutil Object2ObjectMap etc. There are two areas that are important in my use case: * the performance of normal get/computeIfAbsent/forEach etc. FastUtil has for example fast iterators avoid allocating Map.Entry etc. * the memory usage. The total footprint is important because I actually dimension VMs based on stuff. But garbage collection minimization is also really important.
- JanecekPetr 5y agoNice. Thanks. (For other viewers, all the non-standard maps I'm aware of are trying to avoid allocating those pesky Map.Entry objects, that's why they generally take up much less memory.)