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Resolves every certificate's PDF link up front, in parallel

Source: R/utils_download_certs.R
prefetch_cert_links.Rd

The links are needed by add_cert_pdf_links() when the main register.json is written, one HTTP round trip each. Resolving them there, one after another, was the single slowest step of a render on a cold cache. Doing it here means the requests run concurrently and the results are in the caches before any page is rendered; get_cert_link() then answers from memory or disk.

Usage

prefetch_cert_links(register_table, parallel = FALSE, ncores = NULL)

Arguments

register_table

The preprocessed register table

parallel

Whether to resolve the links in parallel

ncores

Number of workers, defaults to one less than the machine has

Value

Invisibly, the number of links resolved

Details

Failures are ignored: a link that cannot be resolved now is simply resolved again (and reported) where it is used.