Replace strings.Split loops with strings.SplitSeq iterators in the CSV
parsers (reality_scan and the scale-test helpers) and swap a manual map
copy for maps.Copy in the MTProto traffic collector. No behavior change;
these are the fixes the modernize analyzer reports.
The paths that run continuously in production had no scale coverage: the
5s traffic poll (AddTraffic with its auto-renew and depleted scans), the
websocket snapshot the job broadcasts while a browser is connected, the
10s ip-limit job (hasLimitIp LIKE scan + per-email settings parse), a
subscription fetch inside a huge inbound, and the full Xray config build.
New benchmarks reuse the XUI_SCALE_TEST / XUI_DB_TYPE gating and stay
log-only. Sizes default to 10k/100k; XUI_SCALE_SIZES=500000 raises the
ladder without editing code. seedScaleDataset writes inbounds, clients,
client_inbounds and client_traffics directly in one transaction instead
of SyncInbound, so a 500k seed takes seconds. XUI_SCALE_DB_PATH persists
the seeded SQLite file for manual smoke runs against a live panel.
MHSanaei