Got a PHP performance tuning tip?

[Habtom]

PHP performance tunning tips. Please add to the list.

1. Reduce the number of connections to the DB.
2. Use (for and while) loops wisely
3. Anybody?

Hab

[Habtom]

arrays vs a number of variables to hold data? What is the speed difference?

Hab

[jatar_k]

I think that would really depend on what you are doing with them. At some point in the eqation there would also be 'ease of use'.

[FalseDawn]

The biggest speedup I obtained was from reducing the number of "includes" and "requires".
Each one of these is a physical disk access, and whilst a good caching and optimizing module can help, I still realized huge parse time decreases by getting rid of as many of these as possible.

Far more significant than worrying about relatively inconsequential things like single vs double quotes for example.

[FalseDawn]

Next on my list would be optimizing your database - using indexes and making sure your queries use them. Benchmark long running queries to see if they can be rewritten. Never assume that even a relatively simple query can't be improved.

Turning on the query cache helps, too, if you are using MySQL, and making sure the database configuaration parameters are optimized for your particular situation.

[HeadBut]

Is there any time savings with alternative syntax? Anyone done any testing? Is there a good site to see these type of test results?