xViewer - memory cumulative consumption, ends in swapping, system freeze

[erikzulu]

Distribution:
Release Linux Mint 18.2 Sonya 64-bit
Kernel Linux 4.4.0-96-generic x86_64
MATE 1.18.0

Xviewer version:  1.4.3

Hardware :>  Available memory:  15GB
Processor:>  Intel® Xeon(R) CPU E31240 @ 3.30GHz

Issue
When viewing a directory with thousands of JPEG images, files are about 1MB each, memory usage continues to accumulate and not released after each image view.
Images are stored on a NAS, drive is NFS mounted.

Steps to reproduce
Step through images using keyboard or mouse navigation.

Expected behaviour
Unexpected behavior - System UI slowed down and froze running applications. After a while opening System Monitor, kswapd0 runs at 90% cpu - when closing Xviewer, system recovers and memory is released.

Other information

[SkyMaverick]

I confirm the memory leak on Mint Cinnamon 19.3 x64. This leak also present when viewing local files.