When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.
There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
| #!/bin/sh | |
| #### | |
| # Dockerize: A tiny replacement for Dockerfiles | |
| # This script leverages `docker run` and `docker commit` to provide a usable workaround for | |
| # restrictions of `docker build` and Dockerfile syntax to strictly host-independent builds. | |
| # | |
| # See these discussions: | |
| # https://github.com/docker/docker/pull/1124 | |
| # https://github.com/docker/docker/issues/3156 | |
| # https://github.com/docker/docker/issues/3949 |
| mkdir modulegraph | |
| cd modulegraph/ | |
| rm -rf * .hg* .git* | |
| hg clone https://[email protected]/ronaldoussoren/modulegraph . | |
| hg checkout modulegraph-0.12 | |
| rm -rf .git* | |
| git init . | |
| git add .hg/hgrc | |
| cat > .gitignore <<EOF |
Updated: Just use qutebrowser (and disable javascript). The web is done for.
| #!/System/Library/Frameworks/Ruby.framework/Versions/Current/usr/bin/ruby | |
| # SET YOUR_HOME TO THE ABSOLUTE PATH OF YOUR HOME DIRECTORY | |
| # chmod +x install.rb | |
| # ./install.rb | |
| YOUR_HOME = '' | |
| HOMEBREW_PREFIX = "#{YOUR_HOME}/usr/local" | |
| HOMEBREW_CACHE = '/Library/Caches/Homebrew' | |
| HOMEBREW_REPO = 'https://github.com/Homebrew/homebrew' |
| <?xml version="1.0" encoding="UTF-8"?> | |
| <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> | |
| <!-- https://gist.github.com/isao/5f6fbe89a438086c36d8 | |
| BBEdit Language Module for TypeScript | |
| Put this file in | |
| ~/Library/Application Support/BBEdit/Language Modules | |
| or equivalent. | |
| Forked from |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
| function hash(str) { | |
| for (var i = 0, len = str.length, s1 = 1, s2 = 0; i < len; i++) { | |
| s1 = (s1 + str.charCodeAt(i)) % 65521; | |
| s2 = (s2 + s1) % 65521; | |
| } | |
| return (s2 << 16) + s1; | |
| } |
| #!/bin/sh | |
| # | |
| # Example showing use of getopt detection and use of GNU enhanced getopt | |
| # to handle arguments containing whitespace. | |
| # | |
| # Written in 2004 by Hoylen Sue <[email protected]> | |
| # | |
| # To the extent possible under law, the author(s) have dedicated all copyright and | |
| # related and neighboring rights to this software to the public domain worldwide. | |
| # This software is distributed without any warranty. |