Re: How does nested columns/lists fragment memory?

[lzl]

Hi Sam,

Thanks for your detailed explanation and documents. I have tried the Immediate garbage collection mode in my application but didn’t get much speed up. I create nested list (mixed with different datatypes) and may release part of it in my function.  And I have some further questions:

1. Will creating temporary nested list within a function and update them locally (without updating to global variables) cause memory fragmentation? For example: I first create a nested list nl and then reassign nl:nl[:: ; 0]
2. If I reassign  nl: nl[:: ; 0] and also update nl to a global variable `.test.nl insert nl, will it cause memory fragmentation?
3. In which scenario will variable declaration operation (:) cause memory allocation in KDB?