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Question about CPU usage by preg_match


etrader

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I have searched a lot but no information about this aspect. I wonder how much heavy is the process of getting parts of a webpage by preg_match?

 

But my question is that which of these options are in favor of lighter CPU process:

 

1. getting each item between specified tags by a preg_match

or

2. First getting the content between <body>, then processing by php tools such as preg_match (again), explode, etc.

 

Thanks for considering this unusual question  :D

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Hi,

 

you should query in the minimal content u can. If your parts in anywhere in the body get the entiry body and run the search loop in it. If those in a div get that div... Anyway regexp is not a fast method. You can use str pos in a loop, with the handy offset paramterer.

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Thanks for your reply. You mean it is better to query all <div> by individual preg_match as they will work simultaneously? Right?

 

You mean that getting the body into a string and then analyzing is a step by step process which takes time? OK?

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