because if you change say 5 lines in program source of 1MB binary program, resulting new 1MB binary will be MUCH different byte-by-byte mostly because of address shifting so lots of pointers to code (or data, rodata) will change. so diff will be big.Regarding most (or many) of the port changes--say, upgrading foo-2.1.9_5 to foo-2.1.9_6, if the upgrade could be done by downloading a binary diff file, could the resulting /usr/local/bin/foo-2.1.9_6 be achieved by downloading a relatively small binary patch? Seems to me that smaller scale upgrades could be done this way in preference to re-compiling ports or downloading entire pacakes. --Same would go for any dependencies.Why is this a bad idea!
recompiling is OK anyway, because you always recompile to your machine (assuming you set CPUTYPE in make.conf)
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