Today I learned...

TLS Certificate Fingerprints

TLS fingerprints are used to identify certificates with a (short) string, but it seems it is not so well documented how they are actually calculated.

Sourcemaps for stacktraces for typescript are slow

I noticed occasional errors pop up in a end-to-end testsuite of one of my applications. It turned out that one particular setting recommended by the Serverless framework did have very negative effect on the code’s performance in certain situations.