investigate page load performance

[andreasgerstmayr]

There is sometimes a bit of a delay in loading the fava top level view on start-up. Is that possibly due to the compute_returns function taking a while to work through my ledger's history? There's nothing in the logs when this delay happens, but if I disable your plugin the top level page loads right away on start-up.

Originally posted by @michaelMinar in #2 (comment)

[andreasgerstmayr]

@michaelMinar The Fava page at /beancount/income_statement/ is loaded slower than usual if this extension is enabled?

That's odd, afaics the code to scan the ledger and compute the returns should only be called if the extension page (/beancount/extension/FavaPortfolioReturns/) is opened 😕