add dev-only profiling with pprof, runtime/trace, and operation timing

Wire up Go's standard profiling toolkit so it's automatically available
in dev builds and completely absent from production. The profiling
package uses build tags (dev/!dev) to eliminate all pprof, trace, and
timing code from release binaries with zero new dependencies.

- backend/profiling: pprof HTTP server on :6060, /debug/trace endpoint,
  block/mutex profiling, and TimeOp helper for structured operation timing
- scripts/profile.sh: interactive menu-driven script that auto-selects
  free ports (8080-8089) so multiple profiles can be open simultaneously
- Instrumented key operations: app init, database init, player load/restore,
  queue set/restore
- Makefile targets: profile, profile-cpu, profile-heap, profile-trace
- .gitignore: exclude trace-*.out and *.pprof artifacts

This commit is contained in:

logan

2026-02-20 18:27:25 -06:00

parent 402789e763

commit 2a3a79652c

13 changed files with 629 additions and 0 deletions

.gitignore

View File

@@ -5,3 +5,7 @@ test_data
 test.db
 .aider*
 lefthook-local.yml
 # Profiling artifacts
 trace-*.out
 *.pprof