The data we plotted in the graph was executions per second, ie the total number of executions divided by time taken. Based on the previous issue results, we thought that the lines would intersect but surprisingly that was not the case. The lines do not intersect with each other even at 18,000 executions. For both, the execution graphs were parallel and from our findings we believe the lines will never intersect; but yes, the execution time will become less as the number of executions increase.

We have also plotted the graph for total time taken to execute the program and found that as the total number of executions is increased the total time taken by both the OSes increases. This makes Linux 64-bit better over Windows 64-bit.We are in the process of continuously testing this out and you can find the updated results on forums.pcquest.com.

This graph shows the difference in performance of PHP-based program on Linux 32-bit and Linux 64-bit. Linux 64-bit is of course better.

Surprisingly, compared to Windows 64-bit, the performance of the PHP-based program on Linux 32-bit, on the same configuration, is better.

We have also tested Linux 32-bit for upto 14,000 executions just to see the difference in performance as compared Linux 64-bit and Windows 64-bit. Yes, the performance was low compared to Linux 64-bit but compared to Windows 64-bit the performance was surprisingly better. We have also plotted a graph for this which gives you a better idea.

To provide a better picture we have plotted two different graphs which show the difference in performance between PHP?on Linux 64-bit and Windows 64-bit. From the graph it is clear that the performance with Linux 32-bit is lower as compared to Linux 64-bit, but as compared to Windows 64-bit the performance difference is not too much.

So, PHP on Linux with Apache is better than Windows with IIS but as the load increases the difference in performance reduces.