add file_copy example #349
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AnujYamdagni
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Jun 29, 2022
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requires #347 and #348
This is the first working version. Cleanup and improvements needed.
It implements a throttling algo adhoc. :(
It runs a bit slower than the std::filesystem version - I need someone with more linux knowledge to point me in the right direction. I speculate that std::filesystem does the entire copy in kernel by using a file copy syscall per file.
this is using liburing to actually open and read and write 64000 byte blocks from user mode.