As a general rule, if you have a slow script, it may be better to use the 'terminate' option. You can experiment to see which mode suits your script better. The options for the 'Queue Mode' are self explanatory, you can either wait until the previous script finishes before running the script again with the latest argument, or you can terminate the currently running script and run a new instance of the script with the latest argument. You'll find this under the "Run Behaviour" button. You can control the script execution behaviour when using a Script Filter input, including the queueing mode, queueing delay and trimming of whitespaces in arguments.
The XML version is available for legacy, but new workflows should use the JSON format instead. If an argument is typed, Alfred no longer sees this Script Filter as relevant and any related results are removed from Alfred. The script is run immediately on keyword matching with the placeholder text and "Please Wait" subtext being shown until the initial script results are returned. The script is run immediately on the keyword matching, with the placeholder text and "Please Wait" subtext being shown until the initial script results are returned.
Once an argument is typed, the "Please Wait" subtext is shown until the initial script results are returned. The script is not run until an argument is present. The Placeholder text and subtext are shown until the user types an argument. There are some subtle nuances regarding the keyword argument types which are worth understanding as it can help get the most out of your filter. The keyword works much like any other keyword throughout Alfred, it allows him to know when you want to run your Script Filter. Without a placeholder, your filter will still work, but will not appear until you start typing your search query text. The placeholder title and subtitle appear until you start typing your actual search query text. Placeholder text is no longer required, but is recommended. When the Script Filter is first run, the subtext is replaced by the "Please Wait" subtext which gives the user feedback while waiting for the initial returned result items. The placeholder title and subtitle is displayed in Alfred's results until the Script Filter keyword is matched or the Script Filter is run. Script Filters are configured like any other workflow input in that they require a keyword, title and icon. Take a look at the JSON Format page for more details.
Select the button > Getting Started and choose "Script Filter Output" to install the workflow. Note: Both the JSON and the legacy XML Output Formats are available as examples within Alfred's Workflow preferences. The Script Filter input is one of the most powerful workflow objects, allowing you to populate Alfred's results with your own custom items.
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