Erlang Debugger vs FlowStorm

Erlang Debugger is a graphical interface for debugging and testing Erlang programs. Developers can set line, conditional, and function breakpoints, then attach to a process to step, continue, finish, skip, or stop its execution. The Attach Process window displays variable bindings and allows editing values when they can be represented in the running system. A Monitor window shows interpreted modules and information about processes running interpreted code. Debugger can record interpreted function calls for stack navigation, though recording tail calls uses more memory and can slow execution when many tail-recursive calls are involved. Modules need debug information, for example from compilation with `erlc +debug_info`. Global mode can interpret code on known nodes and display their processes, but the documentation warns that using global mode on multiple network nodes can cause interference. The debugger is listed for Linux, macOS, and Windows, and Erlang/OTP releases from version 18.0 onward use the Apache License 2.0. Debugging has runtime tradeoffs: interpreted code runs slower, each debugged process adds a meta process, and timers or tracing may behave differently.

FlowStorm is a tracing debugger for Clojure and ClojureScript. It records execution without requiring breakpoints or code changes, then provides tools to step through code, inspect values, explore calls and functions, and investigate exceptions. A timeline displays execution events so users can follow how instructions from different threads interleave. The debugger also supports customizable real-time visualizations and plugins for specialized ways to examine recordings. Values shown in its interface can be sent to the REPL with one click, and recordings can be analyzed using Clojure. The guide covers ClojureScript in browsers, Node.js, and React Native, as well as remote debugging configurations and integrations for Emacs through Cider Storm, VS Code, and IntelliJ IDEA. FlowStorm is free and open source at free, and is listed for Linux, macOS, Windows, and self-hosted use. Minimum requirements are JDK 17 or later and Clojure 1.10.0 or later. Vanilla FlowStorm does not support async/await introduced in ClojureScript 1.12.145; the guide points to ClojureScriptStorm as an alternative.