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0 pointsvvG94KbDUtRa6y ago0 comments

Spoken like someone who has never tried to optimize startup time. If network is your blocker, you need to do it as soon as possible

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4 comments · 3 top-level

jfkebwjsbx6y ago· 1 in thread

Running code before main has nothing to do with performance.

unilynx6y ago

It surely does, performance is more about just raw CPU. Prefetching data (even a DNS query) reduces the latency the user perceives.

The web similarly added the various <link rel=preload, dns-prefetch> tags, so things can be connected and fetched before the JS/CSS code is ready

saagarjha6y ago

Putting more code in a constructor is almost never advised. I would expect that whatever connection the Facebook SDK is making is not a blocker for application launch. (If you have more insight on why this code must unconditionally run this early, I would be glad to hear it.)

munchbunny6y ago

The gain from trying to eke out a millisecond by executing network or filesystem I/O code before main() is extremely marginal compared to the can of worms opened by doing that.

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