Top 9 optimized Open-Source Projects

zlib-ng

13 1,445 9.3 C

zlib replacement with optimizations for "next generation" systems.

Project mention: Show HN: Pzip- blazing fast concurrent zip archiver and extractor | news.ycombinator.com | 2023-09-24

Please note that allowing for 2% bigger resulting file could mean huge speedup in these circumstances even with the same compression routines, seeing these benchmarks of zlib and zlib-ng for different compression levels:
https://github.com/zlib-ng/zlib-ng/discussions/871
IMO the fair comparison of the real speed improvement brought by a new program is only between the almost identical resulting compressed sizes.

libspng

7 690 3.2 C

Simple, modern libpng alternative

Project mention: libpng VS libspng - a user suggested alternative | libhunt.com/r/libpng | 2023-10-30

libspng is already in LibHunt. I'm surprised there is no comparison with libpng.

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
better-mpv-config

2 375 7.5 GLSL

An improved MPV Media Player v3 configuration file.
wrench

4 79 8.1 C++

practical embedded script interpreter (by jingoro2112)

Project mention: Kolibri OS: fits on a floppy disk, programmed using interrupts | news.ycombinator.com | 2023-11-30

Doesn't look promissing, sorry. Was looking and looking, but where is the GUI-based OS?
Nowadays we can use LVGL and C++ to write apps, or run script based C code using interpreters like Wrench: https://github.com/jingoro2112/wrench
What I'm missing is an GUI-based OS like Kolibri to launch apps.

itu

1 21 9.1 Java

An extremely fast parser and formatter of standardized date and date-times supporting RFC-3339 (ISO-8601 profile) and more.

Project mention: JVM Profiling in Action | dev.to | 2024-04-18

Now that the JSON parsing time has decreased, we see that timestamp parsing, specifically java/time/OffsetDateTime.parse, is taking a significant amount of the total parsing time. Java's built-in timestamp parsing is notoriously slow. Luckily, a faster alternative exists: https://github.com/ethlo/itu.

Invasion-Mod

1 6 3.7 Java

Invasion Mod - slightly improved/updated for 1.7.10
fpng-java

1 2 9.1 C++

Java Wrapper for the fast, native FPNG Encoder

Project mention: CPNG, a backwards compatible fork of PNG | news.ycombinator.com | 2023-12-09

Someone made this: https://github.com/manticore-projects/fpng-java
Replacing zlib might give you a few percentage points' worth of difference, whilst fpnge would likely be several times faster.

WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
Fast

1 1 0.0 C++

Fast IO compatible with library making for Arduino. (by GitMoDu)
lfjson

1 0 10.0 C++

A memory-optimized and data-oriented JSON library written in C++

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).