imgcat | divider | etc... Releasing memory after displaying inline images

iTerm2 : Build 2.9.20151001 OS-X : 10.10.5

Clear Buffer (cmd-k) or Clear Scrollback Buffer (shift-cmd-k) does not release the memory (real/private) that was consumed.

Is there a way to clear/release the memory from the images not longer in view/buffer?

(BTW: Love the 2.9.x betas!)