Compression question / problem
alex at tweedly.net
Wed Jan 12 17:58:46 EST 2005
Chipp Walters wrote:
> It'll take only slightly longer to download 50 separate files than one
> large file. I think I would make that design decision based on other
> criteria than just time.
I have to disagree with that - it may take more than "slightly
longer", depending on circumstances.
Multiple small files (assuming you don't parallelize them) will cost you
at least one extra round-trip time per file (and possibly more depending
on the server, firewall, proxy, nat box, etc.). So on a "typical"
client, open a shell and "ping" the server. Take the average round-trip
time reported, and multiply by 50 - that's the approx cost of multiple
You have a base time of around 10 seconds in this case (50 x 10k over a
512K DSL connection), so you can tell whether or not it would be a
my house to my web server
round trip = 48ms, overhead = 2.4 secs. 10 sec vs 12 sec ? - not
my house to runrev.com
round trip = 140 ms, overhead = 7 seconds. 10 sec vs 17 sec - worth
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