sligor

9 ms·

61.
by sligor 8y ago
On a modern out of order uarch that kind of "complex" instruction would by spited in two micro operation, one for each register result. And Agner's tables [1] confirms that the mul 64*64 => 128 is split in two micro-ops on
62.
by sligor 8y ago
I strongly suspect the ARM compiler is not optimized for 128b mults and just calls a generic software function to do the computation like this one: https://github.com/llvm-mirror/compiler-rt/blob/master/l
63.
by sligor 8y ago
theses high Flights numbers seems to be incoherent with the fact that Max is a new plane with small number delivered, it is surely a mistake with the 737NG (next gen) introduced in 1997
64.
by sligor 8y ago
you have also to do this with plain QUIC or with plain TLS adding HTTP on top of both doesn't add RTT, the point was (DNS over QUIC) vs (DNS over HTTP over QUIC)
65.
by sligor 8y ago
HTTP only adds a small size overhead due to header formatting but it won't add latency, and DNS requests are in general dominated by connection latency (outside of local network)
66.
by sligor 8y ago
for speed the ultimate solution would be DNS over HTTP/3 (DNS-over-HTTP-over-QUIC)
67.
by sligor 8y ago
So... chose: - lz4 for speed/cpu usage - zstd for compression ratio - zlib for portability/compatibility with correct compression ratio... but slow... And dump everything else ?
68.
by sligor 8y ago
what I read: RISC-V is a very serious competitor for ARM
69.
by sligor 8y ago
A little off-topic but... what is the interest for large company like Oracle to pay employees on such research effort ? What is the value added for the company ? real product ? or keeping links with advanced research and maintaining high le
70.
by sligor 8y ago
a '+' is a valid character in an URI scheme then http+unix:///path would make more sense
71.
by sligor 8y ago
HTTP over Unix domain socket (owned by the user) would simplify all this. Sadly, browsers don't support this... :(
72.
by sligor 8y ago
the problem is that many low-end and middle-end android tablets are based on Cortex A53 which is a slow in-order CPU (but very power efficient).... The Flash storage performance is also very important for user experience and is often left b
73.
by sligor 8y ago
The blog post says that this bug is inside code written in C and Ragel (a parser generator), Rust seems not to be involved in this bug
74.
by sligor 8y ago
The best alternative to submodules and subtrees I found is git-subrepo: https://github.com/ingydotnet/git-subrepo#benefits