This has been a long-standing complaint with Java, but it’s largely meaningless, and usually based on looking at the wrong information. The usual phrasing is something like “Hello World on Java takes 10 megabytes! Why does it need that?” Well, here’s a way to make Hello World on a 64-bit JVM claim to take over … Read more
It’s a hint to the compiler that the variable will be heavily used and that you recommend it be kept in a processor register if possible. Most modern compilers do that automatically, and are better at picking them than us humans.
view() reshapes the tensor without copying memory, similar to numpy’s reshape(). Given a tensor a with 16 elements: import torch a = torch.range(1, 16) To reshape this tensor to make it a 4 x 4 tensor, use: a = a.view(4, 4) Now a will be a 4 x 4 tensor. Note that after the reshape … Read more
Python 3.4 includes a new module: tracemalloc. It provides detailed statistics about which code is allocating the most memory. Here’s an example that displays the top three lines allocating memory. from collections import Counter import linecache import os import tracemalloc def display_top(snapshot, key_type=”lineno”, limit=3): snapshot = snapshot.filter_traces(( tracemalloc.Filter(False, “<frozen importlib._bootstrap>”), tracemalloc.Filter(False, “<unknown>”), )) top_stats = … Read more
std::launder is aptly named, though only if you know what it’s for. It performs memory laundering. Consider the example in the paper: struct X { const int n; }; union U { X x; float f; }; … U u = {{ 1 }}; That statement performs aggregate initialization, initializing the first member of U … Read more
Modern browsers Plain JavaScript If a DOM element which is removed is reference-free (no references pointing to it) then yes – the element itself is picked up by the garbage collector as well as any event handlers/listeners associated with it. var a = document.createElement(‘div’); var b = document.createElement(‘p’); // Add event listeners to b etc… … Read more
I have re-factored the code in my original answer. I have removed the recursion and removed the assumed existence overhead. function roughSizeOfObject( object ) { var objectList = []; var stack = [ object ]; var bytes = 0; while ( stack.length ) { var value = stack.pop(); if ( typeof value === ‘boolean’ ) … Read more
Stack allocation is much faster since all it really does is move the stack pointer. Using memory pools, you can get comparable performance out of heap allocation, but that comes with a slight added complexity and its own headaches. Also, stack vs. heap is not only a performance consideration; it also tells you a lot … Read more
According to Python Official Documentation, you can explicitly invoke the Garbage Collector to release unreferenced memory with gc.collect(). Example: import gc gc.collect() You should do that after marking what you want to discard using del: del my_array del my_object gc.collect()
The current best practice is: docker system prune Note the output from this command prior to accepting the consequences: WARNING! This will remove: – all stopped containers – all networks not used by at least one container – all dangling images – all dangling build cache Are you sure you want to continue? [y/N] In … Read more