~lobsters | Bookmarks (74)

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You won't believe how this simple trick defeated the unexplained bug destroying every top LGM - Codeforces

codeforces.com

Currently people are discussing a slowdown bug on Codeforces that seems to happen randomly, and can...
Currently people are discussing a slowdown bug on Codeforces that seems to happen randomly, and can cause code to run 100x slower and get TLE. More details in pajenegod's blog post.In this article, I present a mitigation: add the following to your code. #include <windows.h> void *operator new(size_t size) { if (void...

c++performance windows
1
The One Billion Row Challenge in Go: from 1m45s to 4s in nine solutions

benhoyt.com

March 2024 Go to: Baseline | Solutions | Table of results | Final comments I saw...
March 2024 Go to: Baseline | Solutions | Table of results | Final comments I saw the One Billion Row Challenge a couple of weeks ago, and it thoroughly nerd-sniped me, so I went to Go solve it. I’m late to the party, as the original competition was in January. It was also in Java. I’m not particularly interested in ...

go performance
3
JPEG XL and the Pareto Front

cloudinary.com

Version 0.10 of libjxl, the reference implementation for JPEG XL, has just been released. The main...
Version 0.10 of libjxl, the reference implementation for JPEG XL, has just been released. The main improvement this version brings, is that the so-called “streaming encoding” API has now been fully implemented. This API allows encoding a large image in “chunks.” Instead of processing the entire image at once, which ...

graphics performance
2
Scheduling Internals

tontinton.com

osdev performance programming
2
Jevons Paradox doesn’t always apply to software

pythonspeed.com

When it comes to fighting climate change, I strongly believe that getting involved in politics is...
When it comes to fighting climate change, I strongly believe that getting involved in politics is one of the most useful things you can do. But given how energy-intensive software is these days, writing more efficient software also seems worth doing, especially if your software is used at scale. However, whenever ef...

performance practices
1
Java Foreign Function Interface

rocksdb.org

databases java performance
1
What Modern NVMe Storage Can Do, And How To Exploit It: High-Performance I/O for High-Performance Storage Engines

vldb.org

databases pdf performance
2
One Billion Rows Challenge in Golang

bytesizego.com

go performance
2
From 1s to 4ms

thorstenball.com

performance rust
2
Performance Roulette: The Luck of Code Alignment

bazhenov.me

blog developer performance personal
1
Pijul - Pijul (and Sanakirja) on the mainframe

pijul.org

Tuesday, February 13, 2024 By Pierre-Étienne Meunier An underappreciated aspect of Pijul is its backend, Sanakirja,...
Tuesday, February 13, 2024 By Pierre-Étienne Meunier An underappreciated aspect of Pijul is its backend, Sanakirja, which is easy to confuse with a mere key-value store. Sanakirja does include a key-value store, but is primarily a transactional block allocator in a file. Don’t load your datastructures The best featu...

databases performance vcs
1
Vectorizing Unicode conversions on real RISC-V hardware

camel-cdr.github.io

In this article we'll discuss how to achieve the speedup below for UTF-8 to UTF-16 conversion,...
In this article we'll discuss how to achieve the speedup below for UTF-8 to UTF-16 conversion, using the RISC-V Vector extension. I excluded the plain ASCII case from the graph above because it made the other results less readable, the speedup was: 8x for C908, and 11x for C920. More comprehensive measurements are a...

performance
2
Xoranth's musings

xoranth.net

c++performance
1
connect() - why are you so slow?

cloudflare.com

It is no secret that Cloudflare is encouraging companies to deprecate their use of IPv4 addresses...
It is no secret that Cloudflare is encouraging companies to deprecate their use of IPv4 addresses and move to IPv6 addresses. We have a couple articles on the subject from this year:And many more in our catalog. To help with this, we spent time this last year investigating and implementing infrastructure to reduce o...

deep dive ipv4 ipv6 linux networking
1
Proving Performance - FOSDEM 2024 - Rust Dev Room

youtube.com

performance rust science & technology video
1
SI Units for Request Rate

two-wrongs.com

performance
2
The Performance Inequality Gap, 2024 - Infrequently Noted

infrequently.org

performance practices web
3
Process spawning performance in Rust

kobzol.github.io

linux performance rust
2
Identifying Rust’s collect::<Vec>() memory leak footgun

polybdenum.com

performance rust
1
Frame pointers vs DWARF – my verdict

wordpress.com

A couple of weeks ago I wrote a blog posting here about Fedora having frame pointers...
A couple of weeks ago I wrote a blog posting here about Fedora having frame pointers (LWN backgrounder, HN thread). I made some mistakes in that blog posting and retracted it, but I wasn’t wrong about the conclusions, just wrong about how I reached them. Frame pointers are much better than DWARF. DWARF unwinding mig...

performance
1
profiling zsh startup - llimllib notes

billmill.org

performance unix
1
Dolphin: Mastering the Art of Automated Droplet Movement

digitalocean.com

Running shared cloud infrastructure is tricky. One challenge that we have at DigitalOcean is striking the...
Running shared cloud infrastructure is tricky. One challenge that we have at DigitalOcean is striking the right balance between packing as many Droplets as possible onto our servers, and making sure those Droplets remain performant and available. In the process of placing Droplets, it’s common for individual Droplet...

go hardware performance
1
Adaptive _time compression — A database hacker story

axiom.co

compsci databases distributed go performance
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From slow to SIMD: A Go optimization story

sourcegraph.com

go performance
3