Unsafe images Base64 coding

After manipulations around node_modules, ionic versions, i got problem with images visualisation via
Images read from file, “unsafe:” blocks.
I tried DomSanitizer, but it somewhy not helps.

I tried to change images tags to <img [src]=‘cordovaurl+filename’> it same not display picure, with sanitizer also.

this syntax solve problem

does anybody know drawing speed difference between usage based64 and url of picture?