You can use a special template to externalise TiddlyWiki's core code into a separate file. This configuration allows the browser to cache the core for improved efficiency.
! Background
TiddlyWiki in the single file configuration ordinarily packs everything into a single file: your data, and the ~JavaScript, CSS and HTML comprising TiddlyWiki itself. This lack of dependencies is usually very convenient: it means that it is impossible for the parts of a TiddlyWiki to become separated, and enormously improves the chances of it still functioning in the future.
However, there is some inefficiency in this arrangement because the core code is repeatedly loaded and saved every time the content of the wiki is saved. This inefficiency is partially ameliorated when working in the client server configuration because once the wiki is loaded by the browser the synchronisation process only transmits individual tiddlers back and forth to the server.
The remaining inefficiency when working in the client server configuration is that the single page wiki that is initially loaded will contain a copy of the entire core code of TiddlyWiki, making it impossible for the browser to cache it.
The mechanism is activated by setting the [[root-tiddler|WebServer Parameter: root-tiddler]] parameter to `$:/core/save/all-external-js`. This template externalises TiddlyWiki's core JavaScript into a separate file. For example, the following command will start your server with caching enabled. It will transfer the wiki with two GET requests, and the core can be cached by the browser.
You can use the "external-js" template with your single file wiki, but this requires that you have ~TiddlyWiki's core ~JavaScript saved alongside your HTML file. You may prefer this configuration, for example, if you have several wikis on a ~WebDav server. (See: [[Saving via WebDAV]])
<<.warning "This functionality is intended for advanced users: there are many more ways for things to go wrong than with the standard single file configuration">>
If you start your ~TiddlyWiki server in the "external-js" configuration, snapshots you save from the wiki will also have the external-js configuration.
You can click on the "cloud" button and choose <<.icon $:/core/images/download-button>> ''Save snapshot for offline use''. The html wiki you saved will have a reduced file size compared to a regular snapshot because the ~TiddlyWiki core code has been externalized. However, to be able to use this wiki, you ''must'' also have a copy of ~TiddlyWiki's core ~JavaScript in the same directory; see below for instructions for obtaining it
To download a copy of the TiddlyWiki core JavaScript file from any existing TiddlyWiki, visit the system tiddler $:/core/ui/ExportTiddlyWikiCore and click the download button. (You can search for ''~ExportTiddlyWikiCore'' in the ''Shadows'' tab of $:/AdvancedSearch).
!! Obtaining the ~TiddlyWiki core with Node.js
You can also run the following command to obtain the core ~JavaScript. The file `tiddlywikicore-5.x.x.js` will be saved in the`output` directory of your wiki folder:
# Proceed with the [[Upgrade Process for Standalone TiddlyWikis|Upgrading]]. Your wiki will be converted to a full standalone HTML.
# Open your upgraded wiki in the browser. If you'd like to revert to using the regular template, restore the original shadow tiddler `$:/config/SaveWikiButton/Template` by deleting any custom copy. Save your wiki and you are done.
# Otherwise, from your wiki, select the ''Tools'' tab from the sidebar and click on the <<.icon $:/core/images/star-filled>> ''export tiddlywiki core'' button to obtain the core from your wiki.
# Verify that `$:/config/SaveWikiButton/Template` still contains `$:/core/save/offline-external-js`. Modify if necessary.
