slow "stg push" on NFS

hi catalin-

still looking at this problem.

thanks to the several recent patches that add fast-forward support, CPU utilization seems to no longer be a problem in general. what appears to be happening is that each push operation deletes and recreates everything in the working directory.

for shared file systems, creating and deleting files will always be synchronous. anything we can do to eliminate the need for deleting and recreating files that are not changed by a commit would be great.

(i've also noticed that an "stg pop / stg push" sequence causes 'make' to rebuild everything -- possibly due to the same reason?)

am i all wet here?

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