--- Log opened Tue Dec 29 00:01:01 2020
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08:28 < elichai2> I wondered why the context size has more than doubled
08:29 < elichai2> and its the endomorphism opt
08:30 < elichai2> (maybe not more than doubled, but ~doubled)
08:43 < roconnor> Did it really?  The window size was decreased at the same time.
09:36 < andytoshi> ah, in rust-bitcoin we didn't decrease the window size
09:36 < andytoshi> rust-secp*
09:36 < andytoshi> we build without autotools, just set all the flags manually, and i totally forgot to do that
09:37 < andytoshi> though i'm not sure it's important ... if people care about memory usage they can use our lowmemory feature flag which sets the window size super small
09:39 < sipa> iirc that was just benchmarked to be fastest
09:39 < sipa> but probably a long tike ago
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11:08 < elichai2> ha, I somehow missed that the window was decreased
11:09 < sipa> well it should be, but apparently it wasn't :)
11:09 < elichai2> It looks to me like the default is still 15? https://github.com/bitcoin-core/secp256k1/blob/master/configure.ac#L360
11:09 < elichai2> sipa: :)
11:11 < sipa> oh, no, it seems it stayed the same
11:11 < sipa> you're right
11:18 < sipa> so before #596, WINDOW_G was 16 for without-endo and 15 for with-endo
11:18 < sipa> after #596, it defaults to 15 for both
11:18 < sipa> after endo was removed, it's 15 in any case
11:18 < sipa> (unless changed through configure)
11:26 < sipa> in #596 benchmarks were done, and it was apparently concluded that using 15 for both was fine
11:33 < andytoshi> ok, cool .. we are using 15 in rust-secp (and had been for both, hence the apparent doubling when endo was turned on by default)
11:33 < andytoshi> and 4 for "lowmemory"
11:40 < sipa> before #596 it wasn't even configurable, so presumably your choice to pikc 15 was just copying was configure was doing at the time (and still is)
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12:04 < andytoshi> yep
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13:07 < roconnor> Ah I wasn't aware of #596.  My knowledge predates that.
13:16 < sipa> i had forgotten about it as well (not that it made it configurable, but thag it had removed the conditional decrement of window size for endo)
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--- Log closed Wed Dec 30 00:00:02 2020