Description:
Interacting with hi-resolution image in view becomes slow. Memory drops as if image get swapped to disk

Steps to Reproduce:
1. Open a process monitor (to monitor ram usage)
2. Open the attached file
3. Memory usage jumps to 1,1 GB on file open (OK; older versions 715 MB or so)
4. Wait couple of seconds: memory usage drops to 600 MB (older have more of a delay up 20 seconds) 
5. Select the image and start dragging it (lag). At same time memory goes back to 1,0GB and drops again after releasing the image



Actual Results:
Memory gets freed, but at quite some performance penalty 

Expected Results:
Image on the 'active' page being kept in memory for smooth interaction


Reproducible: Always


User Profile Reset: No

Additional Info:
Found in
Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: 220ef19df9de6ee7a99173a514402a9e701748d1
CPU threads: 4; OS: Windows 10 X86_64 (build 19045); UI render: Skia/Raster; VCL: win
Locale: nl-NL (nl_NL); UI: nl-NL
Calc: CL threaded

and in
Version: 7.0.7.0.0+ (x64)
Build ID: 626ea4e62a3e5005fe9825923a1c0c5bdb61cc08
CPU threads: 4; OS: Windows 10.0 Build 19045; UI render: Skia/Raster; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL

also in
Versie: 6.3.0.4 (x86)
Build ID: 057fc023c990d676a43019934386b85b21a9ee99
CPU-threads: 4; Besturingssysteem: Windows 10.0; UI-render: standaard; VCL: win; 
Locale: nl-NL (nl_NL); UI-taal: nl-NL
Calc: CL

also in
Version: 6.1.6.3
Build ID: 5896ab1714085361c45cf540f76f60673dd96a72
CPU threads: 4; OS: Windows 10.0; UI render: default; 
Locale: nl-NL (nl_NL); Calc: CL

fine with
Versie: 6.0.4.1
Build ID: a63363f6506b8bdc5222481ce79ef33b2d13c741
CPU-threads: 4; Besturingssysteem: Windows 10.0; UI-render: standaard; 
Locale: nl-NL (nl_NL); Calc: CL