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02:42:09  <daurnimator>caitp: hrm. thanks for IRHydra recommendation. that has helped a tiny bit: trying to find "deoptimizations".
02:42:22  <daurnimator>one I'm not sure how to address: kInstanceMigrationFailed aka "instance migration failed"
02:45:42  <daurnimator>at the moment my JS code is running ~20 times slower than equivalent C code
02:45:53  <daurnimator>how much should I expect to close that gap?
02:58:46  <caitp>daurnimator: well thats hard for me to say
02:59:11  <caitp>depends what yer doing i guess
02:59:30  <daurnimator>caitp: well most interesting one right now IMO is a lua vm
02:59:37  <daurnimator>(written in javascript)
03:00:36  <daurnimator>I'm currently using 'node --prof' to get a break down of hot spots; but it doesn't really tell me what to do to fix them
03:00:49  <daurnimator>most of the time I try and fix something it barely makes a change....
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11:21:18  <trungl-bot>Tree closed by [email protected]: closed - maintenance
11:47:27  <trungl-bot>Tree opened by [email protected]: open
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16:51:55  <littledan>tl;dr everything is contingent and ephemeral
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19:06:48  <caitp>daurnimator: one of the biggest causes of slowdown (at least back when I worked on angularjs) was an excess of megamorphic functions
19:07:37  <caitp>bbut even in polymorphic code, the optimized code on the hot path ends up fatter and less cheap than it would be if monomorphic
19:07:59  <caitp>there are a lot of other factors that can cause problems, too
19:12:30  <bradleymeck>caitp did their zones impl cause that?
19:12:54  <caitp>well it was analyzed before zones were a thing
19:13:04  <caitp>it was a big problem for the dirty checking code
19:13:33  <caitp>iirc for angular 2 there was a big focus on making dirty checking a lot cheaper
19:13:39  <caitp>but I missed most of that party
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21:07:38  <trungl-bot>Tree closed by [email protected]: closed (https://build.chromium.org/p/client.v8.fyi/builders/V8%20lkgr%20finder/builds/7412 from None)
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21:51:48  <trungl-bot>Tree opened by [email protected]: Tree is open (Automatic: Удачи!)
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