Tag: performance

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Computer Performance is characterised by the amount of useful work accomplished by a computer system compared to the time and resources used.

Good Computer Performance means:

  • Short response time for a given piece of work
  • High throughput (transactions per time unit)
  • Low resource utilization

Computer performance metrics include availability, response time, and capacity. Computer software performance, particularly software application response time, is an aspect of software quality that is important in human–computer interactions.

From en.wikipedia.org/wiki/Performance_Engineering

 

Enhance PHP session management

In PHP, sessions can keep track of authenticated in users. They are an essential building block in today's websites with big communities and a lot of user activity. Without sessions, everyone would be an anonymous visitor. In system terms, PHP sessions are little files, stored on the server's disk. But on high traffic sites, the disk I/O involved, and not being able to share sessions between multiple webservers make this default system far from ideal. This is how to enhance PHP session management in terms of performance and shareability.

Better performance with mod_deflate

I used to use Dean Edwards Javascript Packer a lot to compress my Javascript sources. Libraries of 100kB could easily shrink to 30kB and that saves load times & bandwidth. A good writeup by Julien Lecompte made me realize that there were better ways.

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