Adam Reichold 6672f7be03 Memoize the I/O vector count limit
Keep the I/O vector count limit in a `SyncOnceCell` to avoid the overhead of
repeatedly calling `sysconf` as these limits are guaranteed to not change during
the lifetime of a process by POSIX.
2020-08-05 16:57:02 +02:00
..
2020-08-05 16:57:02 +02:00