James Liu 10da627102 core, subscriber: migrate from lazy_static to once_cell (#2147) ...

Replace `lazy_static` with `once_cell`. Fixes #2146.

## Motivation

`lazy_static!`, while a declarative macro, is a macro nonetheless. It
can add quite a bit of additional compilation time cost.
`once_cell::sync::Lazy` does the same thing with generics, and can be
used more flexibly (i.e. non-static lazily initialized values), and has
been proposed to be added to `std` (see linked issue).

I'm trying to reduce the compile time and dependency tree complexity of
a dependent project: [bevy](https://bevyengine.org), which is using
tracing. `lazy_static` and `once_cell` are both in our dependency tree
and both end up doing the same thing.

## Solution

Migrate to `once_cell`.

2022-06-06 17:32:41 +00:00

..

error.rs

Add tracing-flame crate for generating flamegraphs/flamecharts (#631)

2020-04-21 14:38:41 -07:00

lib.rs

core, subscriber: migrate from lazy_static to once_cell (#2147)

2022-06-06 17:32:41 +00:00