Should i disable Nagel's Algorithm in my http client?

I write a perl script to download many small files(<1M bytes) from
Internet(use Socket 1.78). but i found the script seems running slow.
so should i setsockopt TCP_NODELAY?
BTW: i found while the script running, "gabbage collect" in perl will
make my script run very slow. Anybody help? Thanks very much!

.

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