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uutils-coreutils/tests/common
Jeffrey Finkelstein 2f56536637 dd: fix precision for display of total time spent
Improve the display of the total time spent transferring bytes so that
the number of seconds is displayed using the `%g` format specifier as
in `printf`. This matches the behavior of GNU `dd`.

Before this commit, the precision was always set to one digit after
the decimal point. For example,

    $ dd count=100000 if=/dev/zero of=/dev/null
    100000+0 records in
    100000+0 records out
    51200000 bytes (51 MB, 49 MiB) copied, 0.2 s, 268.1 MB/s

After this commit, the precision increases dynamically as the duration
decreases. For example,

    $ dd count=100000 if=/dev/zero of=/dev/null
    100000+0 records in
    100000+0 records out
    51200000 bytes (51 MB, 49 MiB) copied, 0.1019 s, 507 MB/s
    $ dd count=1000 if=/dev/zero of=/dev/null
    1000+0 records in
    1000+0 records out
    512000 bytes (512 kB, 500 KiB) copied, 0.002663 s, 256 MB/s
    $ dd count=10 if=/dev/zero of=/dev/null
    10+0 records in
    10+0 records out
    5120 bytes (5.1 kB, 5.0 KiB) copied, 0.000182 s, 5.1 MB/s
2023-03-11 22:37:43 -05:00
..
macros.rs fix some clippy warnings (#4229) 2022-12-14 15:42:07 +01:00
mod.rs tail: improve performance of piped stdin 2022-09-09 13:51:37 +02:00
random.rs chore: standardize creation of empty strings 2022-12-01 13:49:23 +01:00
util.rs dd: fix precision for display of total time spent 2023-03-11 22:37:43 -05:00