24 ms·

`mremap` with `MREMAP_FIXED`, but this consumes the original mapping. If you want to actually copy, this isn't possible without destroying the source (because m

`mremap` with `MREMAP_FIXED`, but this consumes the original mapping. If you want to actually copy, this isn't possible without destroying the source (because modifications to the destination would be reflected in the source otherwise).

saagarjha 5y ago
Many operating systems will provide copy-on-write pages as an option, but of course this just refers when the copy will occur.
ant6n 5y ago
In order to implement a vector that can grow, copy shouldn't be necessary.