superdimwit

5 ms·

1.
by superdimwit 2y ago
Thanks!
2.
by superdimwit 2y ago
Clang recently got a new calling convention that makes these tail calls much cheaper (avoids the need for the caller to preserve some registers). I can never remember the name - it’s either preserve_all or preserve_none (whose perspective i
3.
by superdimwit 3y ago
https://eli.thegreenplace.net/2012/07/12/computed-goto-for-e... is a good summary
4.
by superdimwit 3y ago
On 1: this small amount of overhead matters because the amount of work you do on each opcode can be tiny. The extra jump could be 20% of your runtime! On 2: yes, this helps the indirect branch target predictor. In a real program you’ll oft
5.
by superdimwit 3y ago
Try dear-imgui + implot. There are Python bindings
6.
Show HN: A site for competitive performance programming and micro-optimisation(highload.fun)
3 points by superdimwit 4y ago|0 comments
7.
by superdimwit 4y ago
There’s a Hello World on the page
8.
by superdimwit 4y ago
30 years?
9.
by superdimwit 4y ago
Agreed, autovec is in my experience where clang really shines.
10.
by superdimwit 4y ago
Disappointed this wasn't an article about bath houses
11.
by superdimwit 4y ago
One nice property is their stable addressing. A linked list element won't move once allocated.
12.
by superdimwit 5y ago
Amsterdam is good for options market making, most of the techniques in this book come up a lot in trading
13.
by superdimwit 5y ago
reinterpret_cast comes up a lot when handling binary protocols - e.g. reading a message struct off a buffer / packet. How would this be handled in Rust or otherwise without copying the data?
14.
by superdimwit 5y ago
You can just define a generic fallback method like `eff(p, d1, d2) = eff(p, d2, d1)`
15.
by superdimwit 5y ago
Could a difference in alignment of the hot loop also have an effect here?
16.
by superdimwit 5y ago
QR, Cholesky
17.
by superdimwit 5y ago
I most often need to restart the REPL when redefining structs.
18.
by superdimwit 5y ago
If they don't, and can't demonstrate that they're doing something else useful with that money, investors get angry and fire the board.
19.
by superdimwit 5y ago
I am hopeful that Julia should be able to get this cross-session caching of compiled code. Would make restarting the REPL (to e.g. add a field to a struct) much less frustrating.
20.
by superdimwit 5y ago
even better, don't leave it as a comment. Leave it uncommented, as a syntax error, so when you try and run your code on Monday morning you are reminded of it!
21.
by superdimwit 5y ago
Big if/else lists will often get compiled into a jump table anyway.
22.
by superdimwit 5y ago
Go Channels?
23.
by superdimwit 5y ago
ARKK is far from passive
24.
by superdimwit 5y ago
A low-latency GC would also be great. But again, the JVM only has that due to many millions of dollars spent over decades.
25.
by superdimwit 5y ago
In your experience, what are the current limitations?
26.
by superdimwit 6y ago
Who writes the third party library, though?
27.
by superdimwit 6y ago
It does look like the benchmarks include compilation time.
28.
by superdimwit 6y ago
You can memory map Arrow
29.
by superdimwit 6y ago
or a husband?
30.
by superdimwit 6y ago
Exactly, and I don't see how it would work any less well in a to café than VScode remote SSH.

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