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How to reduce the runtime of gc function called by system?

GGLin

Currently I write a SKILL code and find out the run time of gc function takes more than the main function I use in SKILL IDE information(~10x).

This is a system call function to do garbage recollectionin user manual, so I guess this is from some bad coding style but not quite sure how to reduce this problem.

Is there any suggestion to solve this problem?

  • Lots of time spent in gc() typically means that you are creating a lot of data that is getting thrown away (garbage collected). Using the profiler you can profile (by setting the profiler options) to profile for memory - so you can check that. Also look at how you are processing lists to see what your code is doing. Calling gcsummary() can also sometimes give some clues as to the objects themselves that are growing in number or are needing frequent garbage collection.

    You might also want to contact customer support so that an application engineer can look with you and provide some advice?

    Regards,

    Andrew

  • in reply to Andrew Beckett

    Thanks for the suggestion. I found the one critical problem is the append function with large data. By using tconc + car instead of append function the problem is solved.

  • in reply to GGLin

    Ah, yes - using append in a loop to keep appending to the end of a long list can result in a lot of garbage and is a common mistake. You might find it useful to look at my Writing Good SKILL Code (Video) where I mention this (amongst other things).

    Regards,

    Andrew

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