flukejones

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

flukejones

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.

flukejones

#/etc/udev/rules.d/99-nvidia-ac.rules
# Stop nvidia_powerd on battery
SUBSYSTEM=="power_supply",ENV{POWER_SUPPLY_ONLINE}=="0",RUN+="/usr/bin/systemctl --no-block stop nvidia-powerd.service"
# Start nvidia_powerd on AC
SUBSYSTEM=="power_supply",ENV{POWER_SUPPLY_ONLINE}=="1",RUN+="/usr/bin/systemctl --no-block start nvidia-powerd.service"

flukejones

Computer Information:
    Manufacturer:  Unknown
    Model:  Unknown
    Form Factor: Laptop
    No Touch Input Detected

Processor Information:
    CPU Vendor:  GenuineIntel
    CPU Brand:  Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
    CPU Family:  0x6

flukejones

.primary-bg {
  background-color: #3fa1a5; }

.workspace-button {
  padding: 2px; }
  .workspace-button.active {
    background-color: rgba(255, 255, 255, 0.32); }
    .workspace-button.active .workspace-icon {
      color: white; }

flukejones

Keybase proof

I hereby claim:

• I am luke-nukem on github.
• I am luke_jones (https://keybase.io/luke_jones) on keybase.
• I have a public key whose fingerprint is E209 5AD4 C48A D6B6 0930 887F 0562 944A C278 E22C

To claim this, I am signing this object:

flukejones

#!/usr/bin/ion

let pwd = @(pwd)

for dir in @split(@(exa -D))
    cd $pwd/$dir
    echo -e "\nIn $pwd/$dir"
    if test -f Cargo.toml && not test -f rust-toolchain
        echo -e "Cleaning $dir"
        cargo clean

flukejones

/// Problem: there is a lot of duplication in function implementations.
/// The two types should have the same interface but use a different underlying type.
///
/// How can I reduce the amount of duplication and avoid having to update the code in two places?
/// In other languages, I would define a base class which accepts a generic type for the `SoundSource`s
/// but I don't know how to solve this sort of problem in Rust.

struct Sound {
    // Shared properties
    is_playing: bool,

flukejones

" Bare minimum for rust code
" I add other plugins for Nerdtree, git gutter, airline etc
all plug#begin('~/.vim/plugged')
" Status stuff
Plug 'Valloric/YouCompleteMe'
" show ctags (works with rust.vim too)
" see https://github.com/majutsushi/tagbar/wiki#rust for settings
Plug 'majutsushi/tagbar'
" for rls (and others)
Plug 'autozimu/LanguageClient-neovim', {

flukejones

Keybase proof

I hereby claim:

• I am Luke-Nukem on github.
• I am luke_jones (https://keybase.io/luke_jones) on keybase.
• I have a public key whose fingerprint is 869A B608 13C4 24E5 06EB 0D3A 42E6 88B9 27B9 B1BD

To claim this, I am signing this object: