encfs eats up RAM

[manit123]

$encfs /mnt/sda3/encrypted/  /mnt/sda3/willgetempty/
$ free
                    total           used          free          shared      buffers
Mem:       3360116       414564      2945552            0        30436
-/+ buffers:             384128      2975988
Swap:      2936500            0      2936500
$time cp /mnt/sda3/56_5mbvideo /mnt/sda3/willgetempty
real    0m 39.46s
user    0m 0.04s
sys     0m 1.59s
$ free
                    total         used         free               shared      buffers
Mem:       3360116       712800      2647316            0       152844
-/+ buffers:             559956      2800160
Swap:      2936500            0      2936500
$ fusermount  -u /mnt/sda3/willgetempty/
$ free
                total              used           free          shared      buffers
Mem:       3360116       655380      2704736            0       152844
-/+ buffers:             502536      2857580
Swap:      2936500            0      2936500
Clearly this indicates that encfs consumed RAM .
Thus transferring GB's of data freezes OS (I have observed) .

[gerald_clark]

Please read http://www.linuxatemyram.com/

[manit123]

You have cleared my misconception.
BTW , that http://www.linuxatemyram.com/atemyram.png is amusing.

I was using encfs to encrypt GB's of data .
I noticed the system stopped responding after some time .
Can you suggest an encrypting utility that works as fast as copying (not possible , something near this speed) .
I don't need high security . Just a simple password to encrypt & decrypt.
Truecrypt needs container or partition which necessitate fixing initial size. I was looking for flexible. 
What do you suggest ?

[curaga]

Aespipe, bcrypt, or openssl ought to do.

[manit123]

will try
Currently I get 1MBps encryption data rate with encfs.