schedule_nif improvements #1082

Job	Run time
Format	40s
Build ubuntu stable	20s
Build ubuntu nightly	19s
Build windows stable	32s
Build windows nightly	34s
Build macos stable	35s
Build macos nightly	36s
Clippy ubuntu	36s
Clippy windows	23s
OTP 26 / Elixir 1.15 / Rust stable / OS macos	1s
Clippy macos	1s
OTP 26 / Elixir 1.15 / Rust stable / OS windows	3m 0s
OTP 26 / Elixir 1.15 / Rust stable / OS ubuntu	1m 35s
OTP 26 / Elixir 1.15 / Rust nightly / OS macos	1s
OTP 26 / Elixir 1.15 / Rust nightly / OS windows	3m 15s
OTP 26 / Elixir 1.15 / Rust nightly / OS ubuntu	1m 36s
OTP 26 / Elixir 1.14 / Rust stable / OS macos	1s
OTP 26 / Elixir 1.14 / Rust stable / OS windows	3m 56s
OTP 26 / Elixir 1.14 / Rust stable / OS ubuntu	1m 6s
OTP 26 / Elixir 1.14 / Rust nightly / OS macos	2m 58s
OTP 26 / Elixir 1.14 / Rust nightly / OS windows	2m 47s
OTP 26 / Elixir 1.14 / Rust nightly / OS ubuntu	1m 15s
OTP 25 / Elixir 1.14 / Rust stable / OS macos	3m 24s
OTP 25 / Elixir 1.14 / Rust stable / OS windows	3m 24s
OTP 25 / Elixir 1.14 / Rust stable / OS ubuntu	2m 3s
OTP 25 / Elixir 1.14 / Rust nightly / OS macos	3m 2s
OTP 25 / Elixir 1.14 / Rust nightly / OS windows	2m 55s
OTP 25 / Elixir 1.14 / Rust nightly / OS ubuntu	1m 15s
OTP 24 / Elixir 1.13 / Rust stable / OS macos	3m 40s
OTP 24 / Elixir 1.13 / Rust stable / OS windows	3m 21s
OTP 24 / Elixir 1.13 / Rust stable / OS ubuntu	1m 10s
OTP 24 / Elixir 1.13 / Rust nightly / OS macos	3m 8s
OTP 24 / Elixir 1.13 / Rust nightly / OS windows	2m 58s
OTP 24 / Elixir 1.13 / Rust nightly / OS ubuntu	1m 10s
	57m 37s

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