rndr: minor tweaks #1779

Job	Run time
iOS Simulator	2m 3s
Linux (x86_64-unknown-linux-musl)	14s
Tier 1 (ubuntu-24.04, nightly)	18s
Linux (i686-unknown-linux-musl)	12s
Windows 7 (on Windows 10)	1m 39s
Tier 1 (ubuntu-24.04, beta)	14s
Cross (aarch64-unknown-linux-gnu)	34s
Tier 1 (ubuntu-24.04, stable)	13s
Cross (powerpc-unknown-linux-gnu)	23s
Tier 1 (ubuntu-24.04, 1.63)	22s
FreeBSD VM	2m 18s
OpenBSD VM	2m 6s
Tier 1 (windows-2022, nightly)	51s
Sanitizer	33s
Tier 1 (windows-2022, beta)	48s
WASI	26s
Tier 1 (windows-2022, stable)	1m 35s
Web	57s
Tier 1 (windows-2022, 1.63)	47s
Web with Atomics	1m 0s
Windows (stable-x86_64-gnu)	46s
Tier 1 (macos-14, stable)	16s
Windows (stable-i686-gnu)	51s
Windows (stable-i686-msvc)	33s
	19m 59s

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