Add prelim post-spill bench results

Author: Snehal-Reddy

README.md

@@ -44,7 +44,37 @@ Performance comparison showing relative speed (higher numbers = slower). tiny-lr
 | lru-rs | 3.11 | 3.08 | 2.56 | 1.46 | 0.77 |
 | schnellru | 0.98 | 1.14 | 1.21 | 0.90 | 0.60 |
 
-*More benchmarks coming soon - will compare against standard `lru` crate and other implementations*
+## Post-Spill Performance (Large Cache Sizes)
+
+Performance comparison showing relative speed (higher numbers = slower). tiny-lru is the baseline (1.00).
+
+### Peek Operations
+| Implementation | 100 | 200 | 500 | 1000 | 2000 | 5000 | 10000 |
+|------------|------|------|------|------|------|------|------|
+| lru-rs | 2.11 | 2.26 | 2.22 | 2.18 | 2.15 | 1.71 | 1.46 |
+| schnellru | 2.59 | 2.43 | 1.54 | 1.60 | 1.62 | 1.71 | 1.70 |
+| tiny-lru 👍 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
+
+### Pop Operations
+| Implementation | 100 | 200 | 500 | 1000 | 2000 | 5000 | 10000 |
+|------------|------|------|------|------|------|------|------|
+| lru-rs | 1.94 | 1.67 | 1.47 | 1.27 | 1.10 | 0.95 | 0.84 |
+| schnellru | 0.27 | 0.27 | 0.27 | 0.28 | 0.30 | 0.30 | 0.32 |
+| tiny-lru 👍 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
+
+### Get Operations
+| Implementation | 100 | 200 | 500 | 1000 | 2000 | 5000 | 10000 |
+|------------|------|------|------|------|------|------|------|
+| lru-rs | 1.64 | 1.60 | 1.56 | 1.27 | 1.16 | 1.07 | 0.89 |
+| schnellru | 1.49 | 1.28 | 0.86 | 0.83 | 0.82 | 0.82 | 0.83 |
+| tiny-lru 👍 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
+
+### Put Operations
+| Implementation | 100 | 200 | 500 | 1000 | 2000 | 5000 | 10000 |
+|------------|------|------|------|------|------|------|------|
+| lru-rs | 8.17 | 1.73 | 1.54 | 1.51 | 1.34 | 1.34 | 1.36 |
+| schnellru | 1.09 | 1.33 | 1.66 | 1.74 | 1.64 | 1.53 | 1.56 |
+| tiny-lru 👍 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
 
 ### Benchmark Details