Hacker News with Generative AI: Garbage Collection

CPython's Garbage Collector and Its Impact on Application Performance (codingconfessions.com)
Learn how the knowledge of CPython internals translate into performance insights for your code

Python, Performance, Garbage Collection, Programming Languages

16 points by guytv 3 days ago | 0 comments

Shenandoah GC (openjdk.org)
Shenandoah is the low pause time garbage collector that reduces GC pause times by performing more garbage collection work concurrently with the running Java program.

Java, Garbage Collection, Performance, Open Source

37 points by seansh 5 days ago | 0 comments

Next Generation Out of Band Garbage Collection (railsatscale.com)
In 2023, I wrote about how we’ve tuned Ruby’s garbage collector for Shopify’s monolith, including how we implemented out-of-band garbage collection to reduce the impact of major collection on latency.

Ruby, Garbage Collection, Performance Optimization, Software Engineering

172 points by ksec 19 days ago | 81 comments

A Performance Comparison of Modern Garbage Collectors (2021) [pdf] (rodrigo-bruno.github.io)

Performance, Garbage Collection, Computer Science, Programming Languages

56 points by mfiguiere 22 days ago | 13 comments

Incremental Garbage Collection in Ruby 2.2 (2015) (heroku.com)
This article introduces incremental garbage collection (GC) which has been introduced in Ruby 2.2. We call this algorithm RincGC. RincGC achieves short GC pause times compared to Ruby 2.1.

Ruby, Garbage Collection, Programming Languages, Performance

28 points by thunderbong 54 days ago | 2 comments

JVM statistics cause garbage collection pauses (2015) (evanjones.ca)
TL;DR: The JVM by default exports statistics by mmap-ing a file in /tmp (hsperfdata). On Linux, modifying a memory mapped file can block until disk I/O completes, which can be hundreds of milliseconds. Since the JVM modifies these statistics during garbage collection and safepoints, this causes pauses that are hundreds of milliseconds long. To reduce worst-case pause latencies, add the -XX:+PerfDisableSharedMem JVM flag to disable this feature. This will break tools that read this file, like jstat.

Java, Garbage Collection, Performance, Linux

79 points by tosh 63 days ago | 40 comments

Conservative GC can be faster than precise GC (wingolog.org)
Should your garbage collector be precise or conservative? The prevailing wisdom is that precise is always better. Conservative GC can retain more objects than strictly necessary, making GC slow: GC has to more frequently, and it has to trace a larger heap on each collection. However the calculus is not as straightforward as most people think, and indeed there are some reasons to expect that conservative root-finding can result in faster systems.

Garbage Collection, Performance, Programming Languages, Computer Science

144 points by diegocg 75 days ago | 90 comments

Crash the GC with Random Values in Unsafe.Pointers (philpearl.github.io)

Programming, C#, Garbage Collection, Memory Management

27 points by todsacerdoti 82 days ago | 7 comments

Deconstructing the Garbage-First Collector (2020) [pdf] (steveblackburn.org)

Java, Garbage Collection, Performance

25 points by luu 83 days ago | 0 comments

Making PyPy's GC and JIT produce a sound [video] (youtube.com)

Programming, Python, Garbage Collection, JIT Compiler

93 points by luu 91 days ago | 21 comments

Techniques for safe garbage collection in Rust (kyju.org)