I am experiencing the same in a brand new windows 10 system:
R version 3.4.3 (2017-11-30)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)
Matrix products: default
 LC_COLLATE=German_Germany.1252 LC_CTYPE=German_Germany.1252 LC_MONETARY=German_Germany.1252
 LC_NUMERIC=C LC_TIME=German_Germany.1252
attached base packages:
 stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
 compiler_3.4.3 tools_3.4.3 yaml_2.1.17
View(x) becomes so slow, that RStudio becomes unresponsive for up to 20 seconds. Its very annoying.
Indeed my PC is part of a roaming network, and thus i dont think i can change my home directory (as described here: https://gist.github.com/ateucher/f279abc1f7ba12f2763152c18810fb24); or better i am unsure what this command would do to my system, which es embedded in such a network).
Any other ideas?