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KodrAus / Profile Rust on
Last active Sep 13, 2020
Profiling Rust Applications
View Profile Rust on

Profiling performance

Using perf:

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

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

KodrAus /
Last active Jun 29, 2020
Converting between `tracing` key values and `log` key values
use std::fmt;
use log::kv::{self, Source, value::{self, Fill}};
use tracing::{Value, Field, field::{self, Visit}};
pub struct LogField<'kvs>(&'kvs Field, &'kvs dyn Value);
impl fmt::Debug for LogField<'_> {
KodrAus /
Created Apr 11, 2020
Find `msbuild` using `vswhere`
use std::path::PathBuf;
use std::process::Command;
use std::str;
let mut msbuild = PathBuf::from("msbuild");
let check_msbuild = Command::new(msbuild)
use std::{
enum Dyn<'v, T: ?Sized, TStatic: ?Sized>
KodrAus / PureDI.cs
Last active Jan 20, 2020 — forked from davidfowl/PureDI.cs
DI under the hood. This is what DI containers automate for you
View PureDI.cs
using System;
using System.Threading;
namespace PureDI
class Program
static void Main(string[] args)
// Create the singletons once
KodrAus /
Last active Jul 23, 2019
Finding my examples
KodrAus / Dump DotNet JIT
Last active Feb 11, 2019
Debugging .NET JIT Output
View Dump DotNet JIT

See this issue in Kestrel.

This is what I do from my OSX environment.

Build coreclr checked

$ ./ -x64 -checked -skiptests
KodrAus / Replace Concrete impl with
Created Jan 25, 2019
Using cargo features to replace a set of concrete impls with a blanket one
View Replace Concrete impl with

Using cargo features to replace a set of concrete trait impls with a blanket one

There's subtlety involved in doing this so I've just dumped this out from another document in case I ever need to remember what they were in the future.


The Visit trait can be treated like a lightweight subset of serde::Serialize that can interoperate with serde, without necessarily depending on it. It can't be implemented manually:

/// A type that can be converted into a borrowed value.
union MaybeInitialized<T> {
initialized: T,
uninitialized: (),
KodrAus /
Last active Jun 11, 2018
Properties Macro
This example demonstrates a potential macro for capturing log properties.
The macro uses a syntax that's _similar_ to struct literals. The idea is to support
extensions to the way properties are captured using attributes.
There's a bit of a misalignment between how formatting is communicated in the log
message and the contextual properties, but they are a bit different. Args are slurped
up into the message using the formatting API whereas properties are exposed as data.
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