Merge pull request #131 from dtolnay/float #1784

Job	Run time
Rust nightly on Linux	13s
Rust beta on Linux	14s
Rust stable on Linux	7s
Rust 1.62.0 on Linux	8s
Rust stable 18 months ago on Linux	10s
Rust stable minus 8 releases on Linux	11s
Rust nightly on macOS	15s
Rust beta on macOS	15s
Rust stable on macOS	11s
Rust 1.62.0 on macOS	11s
Rust stable 18 months ago on macOS	12s
Rust stable minus 8 releases on macOS	13s
Rust nightly on Windows	26s
Rust beta on Windows	31s
Rust stable on Windows	1m 42s
Rust 1.62.0 on Windows	24s
Rust stable 18 months ago on Windows	23s
Rust stable minus 8 releases on Windows	22s
Rust 1.0.0 on Linux	5s
	6m 13s

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