I have a function 1, contain allocation of some small dict, about two dict with less than 10 elements. And I have function 2 call this function 1 in a for loop about 2^12 times. Then I have call function 2 in a for loop for 2^10 times. Then I found my memory increased quickly, but actually I never r…

[image] Can we reuse Dictionary allocation? Performance I think you could just empty! it at the end of each loop iteration. My understanding is that it won’t shrink the internal vectors. In fact, there’s no way to shrink the internal vectors until julia 1.9, when sizehint!…

In function 1, first I create a new dict with Dict(), then I append some key-value pairs. How can I use empty! to avoid allocation?

If your dict is small, consider using an alternative implmentation, the ArrayDictionary may be an option?

But the biggest problem is my program will be killed because it used lots of memory, about 300G. I don’t why, I didn’t need so much memory to store the needed variables. I frequently allocate small dict, but I use empty! to avoid re-allocate dict, the memory is still increased quickly. And I also …

How can I pre-allocate a dict?

General Usage

xgdgsc April 3, 2023, 7:11am 2

Topic		Replies	Views
Can we reuse Dictionary allocation? Performance question , performance	2	537	August 10, 2022
Should Dict avoid GC allocations for isbits key/value types? Internals & Design dictionary , garbage-collection	3	227	December 10, 2024
Is Dict shrinking feature planned? Internals & Design dictionary , memory	10	1299	September 24, 2021
Proper way to make an empty sizehinted Dict General Usage question	1	454	December 1, 2020
Can I manage the memory by myself? General Usage memory-allocation , garbage-collection , gc	16	2477	February 1, 2025

How can I pre-allocate a dict?

Related topics