rygorous

why doesn't radfft support AVX on PC?

So there's two separate issues here: using instructions added in AVX and using 256-bit wide vectors. The former turns out to be much easier than the latter for our use case.

Problem number 1 was that you positively need to put AVX code in a separate file with different compiler settings (/arch:AVX for VC++, -mavx for GCC/Clang) that make all SSE code emitted also use VEX encoding, and at the time radfft was written there was no way in CDep to set compiler flags for just one file, just for the overall build.

[There's the GCC "target" annotations on individual funcs, which in principle fix this, but I ran into nasty problems with this for several compiler versions, and VC++ has no equivalent, so we're not currently using that and just sticking with different compilation units.]

The other issue is to do with CPU power management.

alkis

The case for deadlines

Rust aims to be the foundation of fast and robust software. A thorn in that side is the choice of timeout-centric APIs for I/O and multithreading. I posit this was a bad choice and it needs to be remedied as soon as possible before more APIs proliferate this (possibly accidental) design decision.

Motivating example: time limited network client request

Task: connect to a remote server, send a request, receive response with an end-to-end timeout of 10 seconds.

Attempt #1

dpineiden

"""
Example with Signal-Slot system from QT
When generate data, sends and load on the Gui's text widget

"""

import sys
from PyQt5.QtCore import QObject, pyqtSignal, QSharedMemory
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMainWindow

timvisee

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

• There are always 24 hours in a day.
• February is always 28 days long.
• Any 24-hour period will always begin and end in the same day (or week, or month).

jFransham

Achieving warp speed with Rust

Contents:

• Number one optimization tip: don't
• Never optimize blindly
• Don't bother optimizing one-time costs
• Improve your algorithms
• CPU architecture primer
• Keep as much as possible in cache
• Keep as much as possible in registers

CodeMyUI

dwfssdfsdfsdfsdf

A Pen by Saijo George on CodePen.

License.

ageis

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

KodrAus

Profiling performance

Using perf:

$ perf record -g binary
$ perf script | stackcollapse-perf.pl | rust-unmangle | flamegraph.pl > flame.svg

NOTE: See @GabrielMajeri's comments below about the -g option.

SethDusek

[package]
authors = ["SethDusek <[email protected]>"]
name = "catch_match"
version = "0.1.0"

[dependencies]
quasi = "0.28.0"
quasi_macros = "0.28.0"

[lib]

plutooo

/*
  Scramble/descramble raw NAND dumps from the NES Classic.
  plutoo 2016

  Cheers to brizzo, derrek.
*/

#include <stdio.h>
#include <string.h>
#include <stdint.h>