Test

Improve docs for the custom backend #1586

Job	Run time
iOS Simulator	4m 55s
Linux (x86_64-unknown-linux-musl)	22s
Windows (stable-x86_64-gnu)	34s
Linux (i686-unknown-linux-musl)	20s
Tier 1 (ubuntu-22.04, nightly)	14s
Windows (stable-i686-gnu)	33s
Windows 7 (on Windows 10)	1m 24s
Tier 1 (ubuntu-22.04, beta)	13s
Linux (i686-unknown-linux-gnu, libc6-dev-i386 lib32gcc-11-dev)	26s
Windows (stable-i686-msvc)	29s
Linux (x86_64-unknown-linux-gnux32, libc6-dev-x32 libx32gcc-11-dev, --no-run)	25s
Tier 1 (ubuntu-22.04, stable)	11s
Tier 1 (ubuntu-22.04, 1.63)	24s
Cross (aarch64-unknown-linux-gnu)	34s
Tier 1 (windows-2022, nightly)	1s
FreeBSD VM	2m 30s
Cross (powerpc-unknown-linux-gnu)	35s
OpenBSD VM	1m 57s
Tier 1 (windows-2022, beta)	5s
Cross (wasm32-unknown-emscripten)	37s
Tier 1 (windows-2022, stable)	1s
Tier 1 (windows-2022, 1.63)	20s
Sanitizer	34s
Tier 1 (macos-14, stable)	18s
NetBSD VM	1m 54s
WASI	27s
Web	54s
	21m 17s

Provide feedback