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fix(worker): Eliminate N+1 queries in ProcessFlakesTask #1421

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fix(worker): Eliminate N+1 queries in ProcessFlakesTask #1421

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31 changes: 27 additions & 4 deletions apps/worker/services/test_analytics/ta_process_flakes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,21 @@ def get_testruns(upload: ReportSession) -> QuerySet[Testrun]:
).order_by("timestamp")


def get_testruns_for_uploads(
uploads: list[ReportSession],
) -> dict[int, list[Testrun]]:
upload_ids = [upload.id for upload in uploads]
testruns = Testrun.objects.filter(
Q(timestamp__gte=timezone.now() - timedelta(days=1))
& Q(upload_id__in=upload_ids)
).order_by("timestamp")

grouped: dict[int, list[Testrun]] = {upload_id: [] for upload_id in upload_ids}
for testrun in testruns:
grouped[testrun.upload_id].append(testrun)
return grouped


def handle_pass(curr_flakes: dict[bytes, Flake], test_id: bytes):
# possible that we expire it and stop caring about it
if test_id not in curr_flakes:
Expand Down Expand Up @@ -81,9 +96,13 @@ def handle_failure(

@sentry_sdk.trace
def process_single_upload(
upload: ReportSession, curr_flakes: dict[bytes, Flake], repo_id: int
upload: ReportSession,
curr_flakes: dict[bytes, Flake],
repo_id: int,
testruns: list[Testrun] | None = None,
):
testruns = get_testruns(upload)
if testruns is None:
testruns = list(get_testruns(upload))

for testrun in testruns:
test_id = bytes(testrun.test_id)
Expand All @@ -106,7 +125,7 @@ def process_flakes_for_commit(repo_id: int, commit_id: str):
log.info(
"process_flakes_for_commit: starting processing",
)
uploads = get_relevant_uploads(repo_id, commit_id)
uploads = list(get_relevant_uploads(repo_id, commit_id))

log.info(
"process_flakes_for_commit: fetched uploads",
Expand All @@ -120,8 +139,12 @@ def process_flakes_for_commit(repo_id: int, commit_id: str):
extra={"flakes": [flake.test_id.hex() for flake in curr_flakes.values()]},
)

testruns_by_upload = get_testruns_for_uploads(uploads)

for upload in uploads:
process_single_upload(upload, curr_flakes, repo_id)
process_single_upload(
upload, curr_flakes, repo_id, testruns=testruns_by_upload[upload.id]
)
log.info(
"process_flakes_for_commit: processed upload",
extra={"upload": upload.id},
Expand Down
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