// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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build.ci-test-parallelism Calculator
Calculates optimal test shard count to minimise wall-clock test time given total test duration and the per-shard overhead, and shows the time vs. cost trade-off. Sharding tests across 4 runners typically cuts CI time by 3×, not 4×, due to shard startup and reporting overhead.
Inputs
Total Min
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Shards
Reference formula or conversion factor shown for context.
Overhead Min
Reference formula or conversion factor shown for context.
Results
wall clock time
The computed duration or time value.
speedup
Factor by which the improved approach outperforms the baseline. 2x speedup = half the original time.
time saved
The total amount saved compared to the baseline scenario — cost savings, time savings, or resource savings.
efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.