Full disk encryption is possible, but very bad for the performance.
No it's not. Not even a little. It takes longer for me to type in the password than it does to decrypt it. As for performance of my computer once its decrypted, I can't tell a difference.
[–] [deleted] ago
[–] e0steven ago
According to Microsoft (again YMMV) it's a single digit percentage in performance loss: Source
[–] brojobbro ago
An SSD and an i5 (or higher) will probably make it negligible.