LONG THREAD / REAL SERVER HTTP MEASUREMENT
AFTER  b86bd056c0f7e86699778b7c26b9dfcd39779102
Linux x86_64, Node v26.13.1, loopback HTTP, real T3 server, fresh synthetic SQLite database, same VM
Fresh replay history: 20 turns x 200 tools x 40,000 bytes
Prompts: agent/mcp; one inline tool every 20 turns; deferWork=1
3 warmups; 40 open + older reads; 15 x 6 concurrent opens
Five rounds, same VM, milliseconds

Round            Open        Older     Combined     6-open p95
1               17.69        14.87        32.64        65.19
2               16.44        13.52        30.13        65.64
3               17.22        13.82        31.17        78.06
4               18.08        15.40        33.76        71.62
5               16.31        13.12        29.75        66.00

Median of rounds / range across round statistics:
Open                 17.22 ms   [16.31, 18.08]
Older page           13.82 ms   [13.12, 15.40]
Open + older         31.17 ms   [29.75, 33.76]
Six opens p95        66.00 ms   [65.19, 78.06]

Returned rows: initial 75, older 75; deferred groups 0/19
Known inline items retained: 0/1 (initial/older); bodies load separately

Synthetic data only. Timings include loopback HTTP and JSON.
Not a browser/render measurement or the historical 6.3 GB DB.
