Hi Monks,

I have these simple one liner tests in my CentOS 7 vps box 

1a. test perl loop with $i=10

$ time perl -e 'for($i=0;$i<=10;$i++){}'

real    0m0.003s
user    0m0.000s
sys 0m0.000s

1b. test PHP loop with $i=10

$ time php -r 'for($i=0;$i<=10;$i++){}'

real    0m0.027s
user    0m0.020s
sys 0m0.004s


in average test 1a and 1b, perl is 9x or 10x faster than PHP

------------------------------------------------------------

2a. test perl loop with $i=10000

$ time perl -e 'for($i=0;$i<=10000;$i++){}'

real    0m0.005s
user    0m0.004s
sys 0m0.000s

2b. test PHP loop with $i=10000

$ time php -r 'for($i=0;$i<=10000;$i++){}'

real    0m0.027s
user    0m0.024s
sys 0m0.000s

in test 2a and 2b, perl still much faster than PHP

------------------------------------------------------------

3a. test perl loop with $i=1000000

$ time perl -e 'for($i=0;$i<=1000000;$i++){}'

real    0m0.091s
user    0m0.088s
sys 0m0.000s

3b. test PHP loop with $i=1000000

$ time php -r 'for($i=0;$i<=1000000;$i++){}'

real    0m0.045s
user    0m0.044s
sys 0m0.004s

in test 3a and 3b, PHP already faster then perl

------------------------------------------------------------

now, use extreme loop number like all benchmark code  
in alioth benchmark game:

4a. test perl loop with $i=100000000

$ time perl -e 'for($i=0;$i<=100000000;$i++){}'

real    0m7.310s
user    0m7.304s
sys 0m0.000s

4b. test PHP loop with $i=100000000

$ time php -r 'for($i=0;$i<=100000000;$i++){}'

real    0m1.624s
user    0m1.616s
sys 0m0.004s

in test 4a and 4b, PHP is much much faster then perl

[download]

I already try compare with java, node, and c and the result same as result above, more loop number make loop slower but not as extreme slower as perl

Is there any setting or ENV to make perl loop faster for big number like test above ?

thx,

In reply to perl process slower and slower when loop number increase by Anonymous Monk

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