Encryption ain't free. Here are three really rough tests on my side:
To encrypted home: time dd if=/dev/zero of=~/dummy bs=512 count=10240 10240+0 records in 10240+0 records out 5242880 bytes (5.2 MB) copied, 0.456936 s, 11.5 MB/s real 0m0.459s user 0m0.010s sys 0m0.440s To my SSD, not encrypted: time dd if=/dev/zero of=/local/dummy bs=512 count=10240 10240+0 records in 10240+0 records out 5242880 bytes (5.2 MB) copied, 0.0222484 s, 236 MB/s real 0m0.024s user 0m0.000s sys 0m0.020s To shared memory: time dd if=/dev/zero of=/tmp/dummy bs=512 count=10240 10240+0 records in 10240+0 records out 5242880 bytes (5.2 MB) copied, 0.0177176 s, 296 MB/s real 0m0.020s user 0m0.000s sys 0m0.010s There is some encryption overhead, but also, the ecryptfs data is written synchronously to the disk, whereas these other tests are cached (as I understand it). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/654764 Title: writing to ecryptfs partition on SSD drive is many times slower than writing to unencrypted partition on the same drive -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
