November 1999
Intermediate to advanced
336 pages
6h 29m
English
Content preview from Efficient C++ Performance Programming TechniquesBecome 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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Precompute
Precomputing is a close relative of caching. When you cache a result, you pay the price of computing it once in the performance-critical path. When you precompute, you don't even pay the first time. You perform the precomputation outside the performance-critical path (say, initialization-time) and never pay the price of performing a costly computation inside the performance-critical path.
Back to the Web server implementation for an example: A Web server spends a significant portion of its time manipulating character strings. If you can speed up string manipulation, performance will rise significantly. One string manipulation task we often encountered was uppercasing strings and characters. If the browser sends us an "Accept:" request ...
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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.