... or Why Pipelining Is Not That Easy
Golang Concurrency Patterns for brave and smart.
By @kachayev
Marcy Boeh mboeh
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Thank you for extending an invitation to speak at HighLoad++. I | |
| sincerely appreciate your consideration. | |
| I am an outspoken advocate for LGBTQ equality; this position is deeply | |
| woven into my work. Clojure From The Ground Up is adamantly | |
| LGBT-inclusive. Jepsen is named after a gay pop anthem and includes | |
| dozens of references to same-sex relationships and trans identities. My | |
| talk slides are populated with bearded nuns, genderqueer punks, and | |
| trans hackers. My twitter feed is about as gay as it is possible to get. |
kachayev
/ concurrency-in-go.md
Last active
September 23, 2025 16:12
Channels Are Not Enough or Why Pipelining Is Not That Easy
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # Summary: In MRI 1.9, if you keep threads in an array in a local variable, the threads may outlive the local variable. | |
| # I have not yet been able to produce a scenario in which the threads are ever garbage-collected. | |
| # You have to remove the thread from the array before it goes out of scope, e.g. using #pop or #clear. | |
| # INPUT DESIRED: If anyone can demonstrate a condition in which a local array keeps threads and those threads are eventually GC'd. | |
| # INPUT DESIRED: Is this expected behavior or a bug? | |
| # NOTE: This test will not work as expected in JRuby, because its garbage collection works differently. Whether the same behavior exists in JRuby is an exercise for someone smarter than I am. | |
| class Foo | |
| THREAD_PROC = lambda{ (0..10).to_a.map do Foo.new end } |
ryanlecompte
/ gist:3281509
Created
August 7, 2012 04:16
ActiveRecord memory leak with multiple threads?
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # It appears that when I perform a query with AR via multiple threads, | |
| # the instantiated objects do not get released when a GC is performed. | |
| threads = Array.new(5) { Thread.new { Foo.where(:status => 2).all.first(100).each { |f| f.owner.first_name } } } | |
| threads.each(&:join) | |
| threads = nil | |
| GC.start | |
| ObjectSpace.each_object(Foo).count # => instances still exist |
kristianlm
/ Chipmunk.mk
Created
May 7, 2012 15:56
Building Chipmunk for Android: An Android NDK module for Chipmunk Physics Engine
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # This makefile will let the Android NDK build a | |
| # libchipmunk.so to go with your 2D Android game. | |
| # download the Chipmunk sources and do | |
| # $ cd <chipmunk-physics> | |
| # $ git checkout Chipmunk-6.0.3 # if you downloaded from source | |
| # $ mkdir -p modules/chipmunk && cd modules/chipmunk | |
| # $ cat >Android.mk <<EOF | |
| LOCAL_HOME := $(dir $(lastword $(MAKEFILE_LIST))) |