I belive this should only be noticeable at the human timescale level
when the tabs have been switched to already and, in that case, seems
to go from 3-400 msec to 50-60 msec on my machine
Essentially all of that time is in redrawing the buffer, so that 50-60
msec is proportional to the height of the DrRacket window, roughly.
(The commit just makes drracket do a single redraw instead of about 4
or so of them per switch ...)
With either
configure --enable-pkgscope=installation
or
raco pkg config -i --set default-scope installation
the default scope of `raco pkg' actions can be changed from
user-specific to installation-wide.
We considered trying to guess when someone building Racket would prefer
installation-wide package scope by default. In particular, someone
building from source for in-place use seems likely to want
installation-wide scope by default. Then again, we don't want to
discourage in-place builds for Unix installations that are intended
for multiple users. So, no guessing for now.
Also, add a `--scope' argument to `raco pkg' commands, which is more in
line with other options, but keep `-i', etc., as shorthands.
The intent is that the configuration module can be rewritten without
recompiling code that uses it, so don't let the compiler inline
configuration values.
The problems were with
* `sqrt' and `expt' on single-flonum complex numbers
* `asin' and `acos' on single-flonum arguments and complex results
* `atan' on mixtures of single-flonum and exact arguments
* `gcd' on mixtures of single-flonum and flonum arguments
guard more of the filesystem manipulations with
handlers and log errors instead of letting them
be raised and show up as internal errors
related to PR 13403
teachpack menu.
Instead DrRacket explicitly changes the menu items when
the language changes or when a teachpack is added/removed
Also, Rackety.
Closes PR 13395
* At least stubbed out all (or almost all) `math/matrix' exports; many
have complete documentation (e.g. types, predicates, accessors,
constructors, for loops, conversion, much of "Comparing Matrices")
* Moved `matrix-zero?' and fixed to use (matrix-error-norm) as its norm
* Added `matrix-basis-cos-angle' (currently a stub; should return smallest
singular value of a certain matrix multiplication)
