I used ApacheBenchmark (ab) to make a few Benchmark tests I was interested in.
If you like to view some more, go to www.phpbench.com.
The most important options are:
- -n: Number of requests to perform
- -c: Number of multiple requests to make
An empty file:
mo[email protected]:~$ ab localhost/empty.php
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking localhost (be patient).....done
Server Software: Apache/2.2.14
Server Hostname: localhost
Server Port: 80
Document Path: /empty.php
Document Length: 0 bytes
Concurrency Level: 1
Time taken for tests: 0.002 seconds
Complete requests: 1
Failed requests: 0
Write errors: 0
Total transferred: 210 bytes
HTML transferred: 0 bytes
Requests per second: 461.04 [#/sec] (mean)
Time per request: 2.169 [ms] (mean)
Time per request: 2.169 [ms] (mean, across all concurrent requests)
Transfer rate: 94.55 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.0 0 0
Processing: 2 2 0.0 2 2
Waiting: 0 0 0.0 0 0
Total: 2 2 0.0 2 2
Now I make 1000 requests to this empty file:
ab -n 1000 -c 1 localhost/empty.php
Time per request: 1.158 [ms] (mean)
With a document of two bytes, I get 1.324 ms. A HTML-Document with 300 kB has 4.287 ms.
Now I'll begin the test I'm interested in. It is related to this Stackoverflow Question. I'll make 10000 requests per Benchmark:
for($i=0; $i<5; $i++) {
$maximum = max(
@count($MyArray[$i*7]),
@count($MyArray[$i*7+1]),
@count($MyArray[$i*7+2]),
@count($MyArray[$i*7+3]),
@count($MyArray[$i*7+4]),
@count($MyArray[$i*7+5]),
@count($MyArray[$i*7+6])
);
echo $maximum.' ';
}
1.817 ms
for($i=0; $i<5; $i++) {
$chunk = array_intersect_key($MyArray, array($i*7=>1, $i*7+1=>2, $i*7+2=>3, $i*7+3=>4, $i*7+4=>5, $i*7+5=>6));
if(count($chunk) > 0){$maximum = max(array_map('count', $chunk));}
else {$maximum = 0;}
echo $maximum.' ';
}
1.801 ms
for($i=0;$i<5;$i++){
$arr = array();
for ($j=0;$j<=6;$j++) {
if (isset($MyArray[$i*7+$j])) $arr[] = count($MyArray[$i*7+$j]);
else {$arr[] = 0;}
}
$maximum = max($arr);
echo $maximum.' ';
}
1.742 ms