# Should the LICENSE and Zend/LICENSE dates be updated too?

2) Solved a memory leak when the return_value variable passed by reference is
   not an integer in system()/exec()/passthru().
3) Solved a bug in exec(), which would make it append to the 2nd parameter
   (passed by reference) if the parameter is an array instead of overwriting it.
4) Changed the code to use the streams code, resulting in a smaller code base.
5) Various cleanups resulting in reduction of overall code base inside the file
   by ~ 1/3.
6) Speed improvements of ~2.5 times compared to previous performance (based on
   attached PHP script).

A better error message for proc_nice() failure.

process.