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perf(tests): optimize medium-slow BDD features (10-100s tier) #489

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brent.edwards wants to merge 1 commits from perf/optimize-medium-features into perf/optimize-slowest-features
pull from: perf/optimize-medium-features
merge into: cleveragents:perf/optimize-slowest-features
Conversation 2 Commits 1 Files Changed 13
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1 Commits

Author SHA1 Message Date
brent.edwards bcef39ef10 perf(tests): optimize medium-slow BDD features (10-100s tier) 
Cap time.sleep and asyncio.sleep globally at 10ms in before_all to
eliminate retry/backoff waits (tenacity wait_fixed, retry_auto_debug
exponential backoff). Save originals as time._original_sleep and
asyncio._original_sleep for tests that need real wall-clock delays
(CircuitBreaker recovery, debounce timers, validation timeouts).

Enhance template-DB patch: add "db." prefix to _SCENARIO_DB_PREFIXES
and check db_path.stat().st_size > 0 so 0-byte auto-created SQLite
files receive the template copy instead of falling through to real
migrations.

Replace subprocess.run CLI invocations with typer.testing.CliRunner
in module_coverage, main_coverage_complete, and coverage_extras step
files, eliminating ~6s Python cold-start overhead per call.

Switch plan_persistence and action_persistence to in-memory SQLite by
default; only cross-restart scenarios use file-based via an explicit
Given step.

Replace MigrationRunner.run_migrations with Base.metadata.create_all
in plan_service_steps for freshly created in-memory engines.

Total tier runtime: 565s -> 21s (96% reduction), 20 features all
under 5s behave-internal time.

Part of #478. Closes #480.
 2026-03-01 07:32:51 +00:00