macfuse: need some sort of caching

[robk]

so doing some initial experiments with mac fuse and python fuse bindings, it seems like the simple act of viewing a directory in finder generates a large number of calls through the fuse api.

I ran a stub (loopback) fs with instrumentation of each fuse call, and opened a directory or two, with only a few files. (having tested a much larger directory and seen correspondingly larger numbers of calls). the tool inserted a 100ms delay in answering each call, which explains the spacing of calls over time.

see attached log.

[robk]

log of fuse calls