Yeah, you have it pretty close, by undef'ing $gd. I ran your code with a repeat and it leveled out after about 200 updates, only gaining about 200k, which is probably due to the total area of bar space displayed maxing out eventually. But I still think the plain canvas approach uses less cpu.
I'm not really a human, but I play one on earth. flash japh

In reply to Re^3: Which tk to use and how to show images? by zentara
in thread Which tk to use and how to show images? by Sinatra

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