Re: PHP 5 performance compared to PHP 4?

John W. Holmes wrote:

>From: "Brazilian Joe" <[email protected]>
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>>I think this belongs on php evangelism.
>>I have earned enough trust to convince the company to install php on our
>>IIS server. I would like to see some performace comparison between PHP 5
>>and PHP 4, if possible under both Linux and Windows. Can Include
>>comparisons to  ASP etc too, but I am more concerned in knowing whether
>>the upgrade from version 4 to version 5 will be worthwhile. Do you have
>>some numbers or URLs to share?
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>Isn't this going to depend too greatly upon what extensions your using, what
>your applications do, what hardware your using, what webserver you're using,
>etc?
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>I can run a FOR loop test and declare PHP5 IS FASTER!! but does that really
>help you?
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>---John Holmes...
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the common language constructs are a way of telling how much efficient 
it is, if a bunch of proper tests are written for each one. I am looking 
for syntethic and real-world performance comparisons, like Mysql queries 
per second for example, or how many times can it find a substring, some 
palpable numbers which tell me that PHP 5 has an advantage. over PHP 4. 
I have read about the new  features, but so far I have not seen this 
type of comparison .*benchmarking* PHP5 vs PHP4. of course, there is no 
way to make a full comparison, but benchmarks can encompass the most 
common use cases, and tell in simple graphs and numbers that we will 
have (just an example) a 20% performance improvement on sql queries, or 
a 500% improvement on floating point intensive apllications.