Anonymized
Implementation details have been anonymized to protect intellectual property. The methodology, metrics, and results are real. For the full technical breakdown, reach out at tomas@omnimetrix.io.
Loop 01: Redundant Query Elimination
BEFORE
AFTER
Loop 01: Redundant Query Elimination
What changed
The pipeline executed three sequential database queries, one of which computed a group count already derivable from the element data returned by another query. That redundant third query was removed entirely, and the group count was calculated in-memory from existing results.
Why we expected it to work
The group count query duplicated the same expensive common table expression chain as the other two queries. Each network round-trip added 10-50ms of latency. Eliminating one of three round-trips should yield roughly a 33% reduction in query time.
Results
| Metric | Before | After | Delta |
|---|---|---|---|
| Mean response time | 1829ms | 1305ms | -28.7% |
| Min response time | 1606ms | 1079ms | -32.8% |
| Max response time | 2155ms | 1648ms | -23.5% |
Why it worked
The removed query accounted for approximately one-third of total query overhead, matching the hypothesis exactly. The in-memory derivation adds negligible compute since it sums a single integer field across ~50 rows. Output verification confirmed identical map structures before and after.
Cumulative impact
Original: 1,829ms → After Loop 01: 1,305ms (28.7% total reduction)