November 2015
Intermediate to advanced
200 pages
4h 26m
English
Content preview from Ruby Performance Optimization
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Visualize with Ruby-Prof Printers
Ruby-prof can generate several types of human-readable reports. I find three of them to be the most useful: flat, call graph, and call stack reports. (You can see the full list in the ruby-prof documentation.)[10] Each serves a different purpose. But we’re learning by example here, and to show them to you, I’ll need a more sophisticated example to profile.
| chp4/app.rb | |
| | require 'date' |
| | require 'rubygems' |
| | require 'ruby-prof' |
| | |
| | # This generates CSV like |
| | # 1, John McTest, 1980-07-01 |
| | # 2, Peter McGregor, 1985-12-23 |
| | # 3, Sylvia McIntosh, 1989-06-13 |
| | def generate_test_data |
| | 50000.times.map do |i| |
| | name = ["John", "Peter", "Sylvia"][rand(3)] + " " + |
| | ["McTest", "McGregor", "McIntosh" ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.