When `raco setup' builds documentation, it now puts cross-reference
keys and dependency information into an SQLite database. So, building
documentation now requires that SQLite is installed (on Unixes; SQLite
is installed by default on Mac OS X, and Racket includes SQLite on
Windows).
The changes are all under the hood, but you may notice the difference:
* DrRacket's initial footprint is about 50 MB smaller for a 64-bit
build.
The savings come from not loading all cross-reference information
into memory. When you ask for documentation on `cons', DrRacket now
consults the database to determine which document might have
information on `cons', and so on.
Ultimately, cross-reference information must be deserialized from
the same kind of "out.sxref" file as before. A large document like
the Reference can have multiple "out.sxref" files, however, so
DrRacket doesn't have to deserialize all of the Reference's
cross-references to show information `cons'.
* When you have a simple Scribble document like
#lang scribble/base
Hello
and click "Scribble HTML", the result is closer to instantaneous.
Scribble doesn't have to load (another copy of) all cross-reference
information into memory before rendering the document.
You get the same improvement when using `raco scribble ++xref-in
setup/xref load-collections-xref'.
* The document-rendering part of `raco setup' uses a little less
memory and runs a little faster.
Besides reducing the need to load and re-load cross-reference
information, dependency and global duplicate-definition checking is
now handled by a database query, so it should scale better.
There will almost certainly be some problems, so keep an eye out for
broken or suspicious `raco setup' or documentation behavior.
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