Join us for our weekly series of short talks: “nf-core/bytesize”.

Just 15 minutes + questions, we will be focussing on topics about using and developing nf-core pipelines. These will be recorded and made available at It is our hope that these talks / videos will build an archive of training material that can complement our documentation. Got an idea for a talk? Let us know on the #bytesize Slack channel!

Bytesize: Workflow safety and immutable objects

This week, Rob Syme (@robsyme) will talk about how to avoid introducing subtle concurrency bugs in your Nextflow workflows by safely modifying objects (or more specifically, by not modifying objects) when writing Groovy closures.