February 2010
Beginner
255 pages
6h 10m
English
Content preview from 97 Things Every Programmer Should Know
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Chapter 41. Interprocess Communication Affects Application Response Time
RESPONSE TIME IS CRITICAL TO SOFTWARE USABILITY. Few things are as frustrating as waiting for some software system to respond, especially when our interaction with the software involves repeated cycles of stimulus and response. We feel as if the software is wasting our time and affecting our productivity. However, the causes of poor response time are less well appreciated, especially in modern applications. Much performance management literature still focuses on data structures and algorithms, issues that can make a difference in some cases but are far less likely to dominate performance in modern multitier enterprise applications.
When performance is a problem in such applications, my experience has been that examining data structures and algorithms isn’t the right place to look for improvements. Response time depends most strongly on the number of remote interprocess communications (IPCs) conducted in response to a stimulus. While there can be other local bottlenecks, the number of remote interprocess communications usually dominates. Each remote interprocess communication contributes some nonnegligible latency to the overall response time, and these individual contributions add up, especially when they are incurred in sequence.
A prime example is ripple loading in an application using object-relational ...
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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.
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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.