Engineering evidence

Measured evidence, separated by workload and build lineage.

Persistara publishes measured results with explicit test boundaries. Newly completed v1.6.10 blind, live-data, concurrency and recovery tests appear first; earlier Databricks benchmarks remain separately attributed.

Latest completed tests · 6–8 October 2026

Frozen Enterprise v1.6.10: evidence on unseen inputs and failure recovery.

The following results were measured on the same frozen v1.6.10 product build in self-run engineering evaluations. They are not independent third-party certification, Databricks production benchmarks or promised customer-wide savings.

10,000 / 10,000
Randomized blind holdout

Exact REUSE / REGROUND / HOLD action matches across 13 predefined scenario classes. Zero observed false-safe reuse, false invalidation or engine errors.

3,500 / 3,500
Future npm events

Exact actions on 3,500 distinct package transitions, including 177 material support changes. 3,323 REUSE and 177 REGROUND decisions; zero observed safety errors.

310,000
Completed hot-path resolves

DS-01 completed 310,000 / 310,000 resolves with zero bad statuses, cross-tenant leakage or engine errors, alongside 744 / 744 mixed-action checks.

Real public input streams · self-run

Three live-data workloads, each with its own recomputation rate.

Companies House · Stage 02
98.1%
Observed recomputation avoidance

981 correct REUSE and 19 correct REGROUND decisions from 1,000 scored repeat updates; 0 observed false-safe reuse, 0 false invalidations, and 357 / 357 scheduled revalidations completed.

Environment Agency · EBV-01
53.8%
Observed recomputation avoidance

538 correct REUSE and 462 correct REGROUND decisions across 1,000 future public readings; 1,000 / 1,000 exact oracle matches, with zero observed false-safe reuse or false invalidations.

npm registry · EBV-02 v1.1
94.94%
Observed recomputation avoidance

3,323 safe REUSE decisions and 177 necessary REGROUND decisions across 3,500 future package transitions. Exact decision agreement: 3,500 / 3,500.

Concurrency, resilience and limits

Safety held under local load and deliberate database faults.

500-user concurrency · Stage 03

50,000 / 50,000 calls completed

All 50,000 local threaded calls completed, with zero bad statuses, deadlocks, timeouts or engine errors. Across all measured phases, p99 was 0.4911 ms and p99.9 was 1.0995 ms.

Database kill / recovery · Stage 04

20 / 20 injected fault cycles recovered

400 / 400 logical events durably reconciled, including 20 / 20 duplicate replays without duplicate downstream effects. HOLD outcomes produced zero downstream effects; no unrecovered persistence errors.

Local process scale · DS-01

41,773 resolves/s at eight workers

Aggregate throughput rose from 11,051 resolves/s at one worker to 41,773 at eight, with p99 of 0.2811 ms. At 16 workers, throughput plateaued near 43,793 resolves/s and p99.9 rose to 34.94 ms.

Integrity and claim boundaries

Recorded outcomes, not universal guarantees

These tests report the observed behaviour of their exact workloads and environments. Detailed protocol, hashes and raw evidence are reserved for controlled technical diligence.

Earlier validated generations · retained separately

Earlier live Databricks and mixed-benchmark findings

The historical results below were obtained on their disclosed earlier validated product builds and workloads. They are not relabelled as v1.6.10 runs.

97.8%
recomputations avoided

978 of 1,000 control-path recomputations avoided in a live Companies House benchmark, with 0 observed false-safe reuse and 0 false invalidations.

71.7%
live model calls avoided

43 of 60 control-path model calls avoided in a live TfL + Databricks benchmark. Measured tokens fell 71.5%; estimated model cost fell ~72.0% in that benchmark.

20,000 / 20,000
mixed decisions matched

Test15 matched every expected decision with 0 observed false-safe reuse and safely avoided full recomputation on 70.0% of cases.

Live public-data benchmark

Companies House

Scored updates1,000
Safely reused978
Necessary recomputations22
Recomputation avoidance97.8%
Measured benchmark recomputation-cost reduction97.83%
False-safe / false invalidation0 / 0 observed
Live changing-data benchmark

TfL + Databricks

Live scored revisions60
Model calls avoided43 / 60 · 71.7%
Measured token reduction71.5%
Estimated model-cost reduction~72.0%
Decisions reproduced60 / 60
False-safe / false invalidation0 / 0 observed
Mixed safety / value

Test15

Expected decisions matched20,000 / 20,000
False-safe reuse0 observed
REUSE / REGROUND / HOLD14,000 / 2,400 / 3,600
Full recomputes avoided70.0%
Model calls avoided in disclosed profile14,000
Context units avoided112,000,000
Live value telemetry

Test20

Measured live model calls30
Provider-reported tokens4,710
Additional actual model-call skips5
Persistara decision p502.141 ms
Live model-call p501,024.585 ms
Blocked requests / downstream writes10 / 0
500
concurrent users

Test21 completed 1,500 live events with 1,042 safety-approved REUSE skips, all 182 required REGROUND calls completed, and 0 final App/model/safety errors.

20k / 20k
independent replay

A separate standard-library process reproduced 20,000/20,000 decisions with 0 mismatches and loaded 0 Persistara runtime modules. Modification and record reordering were detected.

1,200 / 1,200
MLflow scorer rows correct

Two persisted evaluation passes produced deterministic action-correctness and no-false-safe scorers true on every row.

Failure under load

Fail closed, recover deliberately

Live events750
Authority rejections handled fail-closed788
Ambiguous commits reconciled50 / 50
Duplicate replays idempotent100 / 100
Stale-generation replays rejected100 / 100
Final App/model/core safety errors0
Current v1.6.10 packaging

Enterprise release validation

Regression suite198 / 198 PASS
HIGH / CRITICAL container findings0 in frozen scan
Signed release provenancePASS
Offline / no-egress cyclePASS
Restore-to-ready3.313 s
Active-passive failover p501.070 s
Evidence policy: savings, latency and reliability numbers are published only with their test scope. Raw event evidence, detailed benchmark methodology, security findings and protected implementation details are reserved for controlled technical diligence where appropriate.