Focus project on JAX PPO

docs/performance.md

@@ -1,7 +1,10 @@
-# Deep CFR Performance Notes
+# Legacy Deep CFR Performance Notes
 
-This document tracks current runtime bottlenecks for the active Deep CFR
-training path. The numbers below are observational, not a benchmark contract.
+> Historical record only. The supported training stack is JAX PPO; see the
+> root [README](../README.md) and [legacy notes](legacy.md).
+
+This document records the Deep CFR runtime bottlenecks observed before the JAX
+PPO transition. The numbers below are historical, not a benchmark contract.
 
 ## Current Default Runtime
 
@@ -11,7 +14,7 @@ Source run:
 runs/tmp/2026-05-07_171535_deep-cfr-default/metrics.jsonl
 ```
 
-The run used `configs/deep_cfr/default.yaml` with CUDA enabled. At the time of
+The run used `legacy/deep-cfr/configs/default.yaml` with CUDA enabled. At the time of
 inspection, completed metrics covered iterations 70 through 95. The training
 process was still running, so later rows may differ.
 
@@ -88,7 +91,7 @@ This gives 560 traversals per iteration, split into 70 worker batches.
 ## Device Use
 
 The trainer constructs the advantage and strategy networks on `run.device`.
-`configs/deep_cfr/default.yaml` sets:
+`legacy/deep-cfr/configs/default.yaml` sets:
 
 ```yaml
 run: