I think I discovered the problem. I forget to add a parameter to an own written alias, resulting in saving all hashtables each time in stead of just the scores (thus 2 hashtables of 992 and 1100 items were stored each 3 secs).

But still I think using a fwrite without using a fclose would be faster then writing the whole hashtable each time. (because only one line would be written instead of all lines.)

Thnx a lot for the filter command!