PerfTips is a VS Code debugging extension inspired by PerfTips in Visual Studio.
During breakpoint debugging, after you run Continue, Step Over, Step Into, or Step Out, the extension displays the execution time of that step next to where the debugger stops again. This helps you quickly see how long that step took.
Features
Debug-time performance tips similar to Visual Studio PerfTips
Shows elapsed time at the end of the current code line (for example: <=12ms elapsed)
Works directly in your debugging workflow without changing application code
Usage
Start a debugging session (for example, press F5).
After stopping at a breakpoint, run any of these debug actions:
Continue
Step Over
Step Into
Step Out
When the program stops again, the elapsed time for that execution step appears on the right side of the current line.
How It Works (Brief)
Records the start time when a continue / next / stepIn / stepOut request is sent.
Calculates elapsed time when a stopped event is received.
Locates the top stack frame in the stackTrace response and renders the elapsed time as an editor decoration at the end of that line.
Typical Scenarios
Quickly identify which debug step is noticeably slower
Investigate performance issues in loops, I/O calls, or conditional branches
Do lightweight timing checks before introducing a full profiler
Notes
The displayed value is an approximate elapsed time from the last resume action to the current stop.
Results can be affected by debugger implementation details, breakpoint behavior, and runtime environment fluctuations.
This timing is useful for quickly spotting hotspots, but it is not a strict benchmark measurement.
