LZMA vs LOLZ & Scan Compress Method

[yasitha]

LOLZ Decode Memory
Calculate Problem

I've Used d192:mtt1:mt4, for Compression,
and when it finished, it showed
Decode mem use 392mb for per thread.

and i have 4c/8 thread cpu.

While decompressing lolz
Use 2.330MB RAM

It should be 1568mb
for decompressing
(392mb x mt4 = 1568mb)

Ram memory using!
Oodle for 300 MB
Srep for 550MB
LOLZ for 2.330MB

what I'm i missing here?
Why lolz use 2.3Gb instead 1.5GB?