perf: skip unused callers JSON decode in ProfileStats #329

Job	Run time
check-linked-issue	2s
determine-changes / detect	7s
coverage	7m 35s
type-check	27s
unit-tests (ubuntu-latest, 3.12)	7m 19s
unit-tests (ubuntu-latest, 3.10)	8m 4s
unit-tests (ubuntu-latest, 3.14)	6m 14s
prek / prek	31s
e2e-python (bubble-sort-unittest, end_to_end_test_bubblesort_unittest.py, 40)	4m 31s
e2e-python (topological-sort, end_to_end_test_topological_sort_worktree.py, 5)	2m 30s
unit-tests (ubuntu-latest, 3.9)	9m 3s
e2e-python (async-optimization, end_to_end_test_async.py, 10)	3m 52s
e2e-python (futurehouse-structure, end_to_end_test_futurehouse.py, 5)	2m 49s
e2e-python (tracer-replay, end_to_end_test_tracer_replay.py, 10)	5m 9s
e2e-python (bubble-sort-pytest-nogit, end_to_end_test_bubblesort_pytest.py, 70, true)	12m 24s
e2e-python (coverage-e2e, end_to_end_test_coverage.py, black)	5m 28s
unit-tests (windows-latest, 3.13)	13m 16s
e2e-python (benchmark-bubble-sort, end_to_end_test_benchmark_sort.py, 5)	8m 46s
unit-tests (ubuntu-latest, 3.13)	7m 39s
e2e-python (init-optimization, end_to_end_test_init_optimization.py, 10)	4m 35s
e2e-java	0s
unit-tests (ubuntu-latest, 3.11)	7m 4s
e2e-js	-1s
required checks passed	2s
	1h 57m 26s

Provide feedback