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Code Issues Releases Wiki Activity

Add indexes to the wiki store to improve performance (#3951)

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* First pass at modular wiki indexes

An exploratory experiment

* Fix tests

* Faster checking for existence of index methods

We don't really need to check the type

* Use the index for the has operator

* Fix typo

* Move iterator index methods into indexer modules

Now boot.js doesn't know the core indexers

* Fix up the other iterator index functions

* Fix crash with missing index branch

* Limit the field indexer to values less than 128 characters

* Fallback to the old manual scan if the index method returns null
* Sadly, we can no longe re-use the field indexer to accelerate the `has` operator, because the index now omits tiddlers that have field values longer than the limit

Still need to make the index configuration exposed somehow

* Rearrange tests so that we can test with and without indexers

We also need to expose the list of enabled indexers as a config option

* Test the field indexer with different length fields

So that we test the indexed and non-indexed codepaths
This commit is contained in:
Jeremy Ruston
2019-05-24 21:07:37 +01:00
committed by GitHub
parent b992b79adb
commit a8f70b08a8
10 changed files with 403 additions and 27 deletions
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27
core/modules/wiki.js
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@@ -27,6 +27,16 @@ var widget = require("$:/core/modules/widgets/widget.js");
var USER_NAME_TITLE = "$:/status/UserName",
TIMESTAMP_DISABLE_TITLE = "$:/config/TimestampDisable";
/*
Add available indexers to this wiki
*/
exports.addIndexersToWiki = function() {
var self = this;
$tw.utils.each($tw.modules.applyMethods("indexer"),function(Indexer,name) {
self.addIndexer(new Indexer(self),name);
});
};
/*
Get the value of a text reference. Text references can have any of these forms:
<tiddlertitle>
@@ -478,11 +488,18 @@ exports.getOrphanTitles = function() {
Retrieves a list of the tiddler titles that are tagged with a given tag
*/
exports.getTiddlersWithTag = function(tag) {
var self = this;
return this.getGlobalCache("taglist-" + tag,function() {
var tagmap = self.getTagMap();
return self.sortByList(tagmap[tag],tag);
});
// Try to use the indexer
var self = this,
tagIndexer = this.getIndexer("TagIndexer"),
results = tagIndexer && tagIndexer.lookup(tag);
if(!results) {
// If not available, perform a manual scan
results = this.getGlobalCache("taglist-" + tag,function() {
var tagmap = self.getTagMap();
return self.sortByList(tagmap[tag],tag);
});
}
return results;
};
/*