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rustdoc: Use smaller sequential numbers instead of `NodeId`s for parents. 

`allPaths` is now a flat array in effect. This decreases the size of
the search index by about 4--5% (gzipped or not).
This commit is contained in:
Kang Seonghoon 2014-04-09 15:52:31 +09:00
parent 5d284a0daa
commit ab6915d7b5
1 changed files with 22 additions and 13 deletions
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35
src/librustdoc/html/render.rs
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@ -262,6 +262,9 @@ pub fn run(mut krate: clean::Crate, dst: Path) -> io::IoResult<()> {
});
cache.stack.push(krate.name.clone());
krate = cache.fold_crate(krate);
let mut nodeid_to_pathid = HashMap::new();
let mut pathid_to_nodeid = Vec::new();
{
let Cache { search_index: ref mut index,
orphan_methods: ref meths, paths: ref mut paths, ..} = cache;
@ -283,17 +286,21 @@ pub fn run(mut krate: clean::Crate, dst: Path) -> io::IoResult<()> {
}
};
// Prune the paths that do not appear in the index.
let mut unseen: HashSet<ast::NodeId> = paths.keys().map(|&id| id).collect();
// Reduce `NodeId` in paths into smaller sequential numbers,
// and prune the paths that do not appear in the index.
for item in index.iter() {
match item.parent {
Some(ref pid) => { unseen.remove(pid); }
Some(nodeid) => {
if !nodeid_to_pathid.contains_key(&nodeid) {
let pathid = pathid_to_nodeid.len();
nodeid_to_pathid.insert(nodeid, pathid);
pathid_to_nodeid.push(nodeid);
}
}
None => {}
}
}
for pid in unseen.iter() {
paths.remove(pid);
}
assert_eq!(nodeid_to_pathid.len(), pathid_to_nodeid.len());
}
// Publish the search index
@ -308,23 +315,25 @@ pub fn run(mut krate: clean::Crate, dst: Path) -> io::IoResult<()> {
item.ty, item.name, item.path,
item.desc.to_json().to_str()));
match item.parent {
Some(id) => {
try!(write!(&mut w, ",parent:'{}'", id));
Some(nodeid) => {
let pathid = *nodeid_to_pathid.find(&nodeid).unwrap();
try!(write!(&mut w, ",parent:{}", pathid));
}
None => {}
}
try!(write!(&mut w, "\\}"));
}
try!(write!(&mut w, "];"));
try!(write!(&mut w, "allPaths['{}'] = \\{", krate.name));
for (i, (&id, &(ref fqp, short))) in cache.paths.iter().enumerate() {
try!(write!(&mut w, "allPaths['{}'] = [", krate.name));
for (i, &nodeid) in pathid_to_nodeid.iter().enumerate() {
let &(ref fqp, short) = cache.paths.find(&nodeid).unwrap();
if i > 0 {
try!(write!(&mut w, ","));
}
try!(write!(&mut w, "'{}':\\{type:'{}',name:'{}'\\}",
id, short, *fqp.last().unwrap()));
try!(write!(&mut w, "\\{type:'{}',name:'{}'\\}",
short, *fqp.last().unwrap()));
}
try!(write!(&mut w, "\\};"));
try!(write!(&mut w, "];"));
str::from_utf8(w.unwrap().as_slice()).unwrap().to_owned()
};