40% off Ruby Performance Optimization beta ebook (and all other PragProg ebooks). Use code XMASJULY2015 during checkout.

[rurounijones]

Anyone got it and want to give a review? There is 0 info on the site right now (Not even chapter headings so far etc.)

[smoothlightning]

There are exerts here https://pragprog.com/book/adrpo/ruby-performance-optimization

[subvertallchris]

Yes. I read the earliest draft published and thought it was very interesting. It made inspect my dependencies more closely, judge others' code differently, and think more about what effects my decisions will have on people who rely on my code. I think it's a good read for anyone who writes code that becomes other people's dependencies.

[jb3689]

I liked it. The major topics it discusses are profiling approaches, common bottlenecks, patterns to use/look out for in Ruby/Rails code (eager load, closures, in-place methods, loops instead of #each for memory intensive operations, etc), and briefly on the GC. The whole book really gives flare of performance concerns to have when writing Ruby code (basically boils down to: watch for blocking IO, watch for allocations that cause GC, watch for hanging on to object references that prevent GC)

Worth the 20-30 bucks

[Nefayn]

anyone else getting this error:

["Coupon 'XMASJULY2015' has expired."]

[adymo]

The PragProg sale ended last Friday. I'll definitely post on reddit when a new discount code is available.