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There is a machine somewhere in slc that has about 20000 subdirectories in /home, moreover, these subdirectories are readable. In such situation, as soon as user tries to open /home, say, in file chooser, IDE tries to schedule refresh for each of them (and then it calls ls() for each changed one). This slows things down a lot.
It seems to be a regression caused by hg.netbeans.org/cnd-main/rev/c7da0973e09b
The obvious change (fixing a regression caused by above-mentioned commit) is http://hg.netbeans.org/cnd-main/rev/dbd0378323b6 This does not fix the entire problem, however: due to asking for nbproject subfolder for each of these 20K+ directories (and probably some other reasons as well), IDE and fs_server still surf these home dirs.
Integrated into 'main-silver', will be available in build *201411070002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-silver/rev/dbd0378323b6 User: Vladimir Kvashin <vkvashin@netbeans.org> Log: fixing #248243 - Remote file system goes into directories it should not
Integrated into 'releases/release801', will be available in build *201411102027* or newer. Wait for official and publicly available build. Changeset: http://hg.netbeans.org/releases/rev/58b047b8ed71 User: Vladimir Kvashin <vkvashin@netbeans.org> Log: fixing #248243 - Remote file system goes into directories it should not (transplanted from dbd0378323b6f9bfb1937e8be2b817a4b0946b00)
Just a note: it is partially fixed and the fix is already transplanted into releases/release801 a while ago. Further fixing is not safe enough for patch.
http://hg.netbeans.org/cnd-main/rev/3adf9b14bcb3
Integrated into 'main-silver', will be available in build *201506240001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-silver/rev/3adf9b14bcb3 User: Vladimir Kvashin <vkvashin@netbeans.org> Log: fixed #248243 - Remote file system goes into directories it should not