CLI: use one process to test many keys for mfkey32v2 #191
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It is done by adding a "server" mode (on STDIN/STDOUT) to `mfkey32v2` using `--server`. This improves the speed of the decrypt process, as it prevents a lot of Python calls to `subprocess.Popen()` (and of course, a lot of fork/execve syscalls). On my laptop, with the same logs (37 records for one block and 37 records for another block), here are the performances, as measuerd using a simple command: ```bash time echo -e "hw connect\nhf mf elog --decrypt\nhw disconnect" | ./chameleon_cli_main.py ``` | | | real | user | sys | |---------------------------|---------|------------|------------|-----------| | Before parallelisation | 05ea03d | 14m59,277s | 14m47,995s | 0m8,490s | | With parallelisation | RfidResearchGroup#187 | 6m13,513s | 35m2,926s | 0m22,038s | | With item skipping | RfidResearchGroup#189 | 2m42,491s | 15m43,425s | 0m9,881s | | With `mfkey32v2 --server` | this PR | 1m55,160s | 0m1,315s | 0m0,250s |
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It is done by adding a "server" mode (on STDIN/STDOUT) to
mfkey32v2using--server.This improves the speed of the decrypt process, as it prevents a lot of Python calls to
subprocess.Popen()(and of course, a lot of fork/execve syscalls).On my laptop, with the same logs (37 records for one block and 37 records for another block), here are the performances, as measured using a simple command:
mfkey32v2 --serverAlso, the Python code has been cleaned a bit, mostly to improve readability.