Signing multiple files individually is slow

[arivoir]

I'm in the process of migrating from signtool to azuresigntool and it happens it is way much slower.
Apparently the reason is every invocation of the tool(400+) downloads the certificate again from azure.
I know it is possible to sign multiple files in one call, but I wonder if there is any way of accelerating the process and keep individual calls to the tool? Like caching the certificate or avoiding the download somehow.