Blog post: "So You Want To Optimize Ruby"

So You Want To Optimize Ruby

Blog post: "So You Want To Optimize Ruby"

I was recently asked for a list of "hard problems" a Ruby implementation really needs to solve before reporting benchmark numbers. You know...the sort of problems that might invalidate early perf numbers because they impact how you optimize Ruby. This post is a rework of my response...I hope you find it informative! Fixnum to Bignum promotion In Ruby, Fixnum math can promote to Bignum when the result is out of Fixnum's range. On implementations that use tagged pointers to represent Fixnum (MRI, Rubinius, MacRuby), the Fixnum range is somewhat less than the base CPU bits (32/64). On JRuby, Fixnum is always a straight 64-bit signed value. This promotion is a performance concern for a couple reasons: Every math operation that returns a new Fixnum must be range-checked. This slows all Fixnum operations. It is difficult (if not impossible) to predict whether a Fixnum math opera...

Full article: http://blog.headius.com/2012/10/so-you-want-to-optimize-r...

Tweets

@elon_f » 12 Nov '12, 2pm
Hard problems in #ruby implementations... that are solved in #jruby via @headius [link]
@kawasy » 27 Oct '12, 2am
Reading... / "hard problems" a Ruby implementation really needs to solve " [link]
@brucehsu » 24 Oct '12, 12pm
"So you think you can optimize Ruby" (誤) 是說有些地方看得一知半解…… orz [link]
@stackful_io » 22 Oct '12, 12am
So You Want To Optimize Ruby [link] | VPS [link] | #ruby #developer #coding #programmer #rails #ror :)
@AkitaOnRails » 21 Oct '12, 12pm
@danielszmu btw remember I mentioned you’d like to read Charles Nutter’s (@headius) blog posts? This is an example [link]
@bjeanes » 18 Oct '12, 1am
RT @whitequark: Optimizing Ruby is hard. A very nice overview by @headius: [link]
@rubyve » 18 Oct '12, 12am
RT @coders_vzla: Headius: So You Want To Optimize #Ruby [link] @rubyve
@ice_on_rails » 17 Oct '12, 5am
Optimize with #Ruby. [link]
@coders_vzla » 17 Oct '12, 2am
Headius: So You Want To Optimize #Ruby [link] @rubyve
@tk0451 » 16 Oct '12, 8pm
Headius: So You Want To Optimize Ruby: 6 users [link]
@billmag » 16 Oct '12, 7pm
This list makes the current Ruby feature set way too big. "Headius: So You Want To Optimize Ruby" [link]
@bhatti_shahzad » 16 Oct '12, 3pm
Optimize Ruby [link]
@pat_shaughnessy » 16 Oct '12, 12pm
A difficult read, but lots of great insight on Ruby internals here from @headius: "So You Want To Optimize Ruby" [link]
@akisaarinen » 16 Oct '12, 7am
So you want to optimize Ruby [implementations] [link]
@_wee_ » 16 Oct '12, 3am
So You Want To Optimize Ruby [link] via @zite
@samof76 » 16 Oct '12, 3am
RT @hnycombinator: Headius: So You Want To Optimize Ruby [link]
@jedisct1 » 16 Oct '12, 2am
RT @mshk: Headius: So You Want To Optimize Ruby [link]
@tek_news » 16 Oct '12, 2am
HNews: Headius: So You Want To Optimize Ruby [link] #ruby
@clipperhouse » 16 Oct '12, 1am
[nerds] Ruby is optimized for developer pleasure, not performance: [link]
@stringsn88keys » 16 Oct '12, 1am
RT @jeremyday: Headius: So You Want To Optimize Ruby [link]
@HNTweets » 16 Oct '12, 1am
Headius: So You Want To Optimize Ruby: [link] Comments: [link]
@RubyReflector » 15 Oct '12, 8pm
Top Ruby Article: So You Want To Optimize Ruby: [link]
@whitequark » 15 Oct '12, 6pm
Optimizing Ruby is hard. A very nice overview by @headius: [link]
@qmx » 15 Oct '12, 6pm
RT @headius: Blog post: "So You Want To Optimize Ruby" [link]
@headius » 15 Oct '12, 6pm
Blog post: "So You Want To Optimize Ruby" [link]
@andrewjgrimm » 15 Oct '12, 7pm
RT @headius: Blog post: "So You Want To Optimize Ruby" [link]
@delicerubyrails » 15 Oct '12, 7pm
Headius: So You Want To Optimize Ruby: [link]
@statonjr » 15 Oct '12, 6pm
RT @headius: Blog post: "So You Want To Optimize Ruby" [link]
@ferhr » 15 Oct '12, 6pm
RT @headius: Blog post: "So You Want To Optimize Ruby" [link]
@f_bernier » 15 Oct '12, 6pm
RT @headius: Blog post: "So You Want To Optimize Ruby" [link]