--cpu-prof wrong line numbers

[sigmaSd]

Version: deno 2.7.4+b7cc30f linux

deno -RES --cpu-prof https://jsr.io/@sigmasd/nub/0.9.0/main.ts list

open the cpuprofile , notice that the line numbers associated with main.ts are wrong (it seems like they're offset-ed by something since they're bigger the the file lines number)

[kajukitli]

The line numbers are from V8's profiler which reports transpiled JavaScript positions, not original TypeScript positions. The --cpu-prof implementation currently writes the raw V8 profile data without applying source maps.

To fix this, the profiler would need to:

1. Parse the profile's nodes[].callFrame entries
2. For each .url + .lineNumber + .columnNumber, look up the original position via the source map
3. Rewrite the positions before writing the profile

This is the same problem Node.js has - their --cpu-prof also outputs transpiled positions unless you use a tool like source-map-support at runtime or post-process the profile.