This reverts commit 7227f64ea8.
This reverts commit b4972af3a5.
Saving 400ms of rebuild time isn't worth sometimes having to restart the
app from scratch.
If you have a lot of packages and you change something in a package that
is used by lots of other packages, such as "meteor" or "modules", then the
rebuild can take a lot longer than ten seconds.
we were already passing the mode of `from` into `files.copyFile`
in at least one place, but `files.copyFile` was dropping it on
the floor. now we use it avoid doing a second stat.
Also, list copyFile in the profiler report. copyFile does its own
custom file I/O, so it didn't show up as a readFile or writeFile
which are automatically profiled.
Previously, we would generate reports on
"Selecting Package Versions" and "Rebuild App".
- Instead of just profiling constraint solving, profile the entire
process of preparing the project via ProjectContext, by giving
each public function that "advances the stage" a Profile.run
(typically prepareProjectForBuild).
- Improve profiler output to better distinguish multiple runs
- Distinguish "Build App" and "Rebuild App"
- Instrument lots of calls that weren't instrumented before
