Updated docs on benchmarks

readme.md

@@ -15,8 +15,8 @@ and field line tracing:
 | **Vern7** (Verner) | 7(6) | 10+6 | 7th order | High accuracy (rtol ~ 1e-8 to 1e-12) |
 
 **Performance at 1e-10 tolerance:**
-- Vern7: **2.7-8.8x faster** than DP5
-- Vern7: **50x+ faster** than BS3
+- Vern7: **2.9-9.9x faster** than DP5
+- Vern7: **53-83x faster** than BS3
 
 See [benchmark report](VERN7_BENCHMARK_REPORT.md) for detailed performance analysis.