Quick question: do you know how your Ruby debugger actually works?
Every third Ruby run is a debug run — yet most developers never question which debugger they’re using or what it costs them.
I wrote a deep-dive into how Ruby debuggers actually work under the hood: TracePoint, Instruction Sequences, and why Byebug can slow your program down by 30x just by being attached.
The article covers: → How TracePoint and ISeq power every major Ruby debugger → Why Byebug goes from 17.7s to 529s on the same workload → How the debug gem eliminated that overhead entirely → What RubyMine adds on top for Ruby 2.3+ users → A practical decision guide for choosing the right tool
If you’re still reaching for Byebug out of habit, this one’s worth a read.
#RubyOnRails #Debugging #RubyKaigi #DevTools #FediDev #Programming #Ruby
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