November 2015
Intermediate to advanced
200 pages
4h 26m
English
Content preview from Ruby Performance OptimizationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 7Measure
So far I’ve avoided talking too much about measurements, despite their obvious importance to optimization. Why? Because in most cases people get it right. Your intuition nudges you to run the code several times, measure results, and pick the most commonly seen measurement.
This is a viable approach, and it should yield meaningful results most of the time. But if you get your measurements wrong, your optimization will go wrong too. You may either miss the small speedup, or falsely believe in ten times optimization where in fact there is none.
So let’s think about what can go wrong with measurements and how to deal with it.
External factors are the first issue that comes to mind. These might be processes running in parallel ...
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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.
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.Addison B.
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.Amir M.
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.