diff --git a/_benchmark/README.md b/_benchmark/README.md
index 63146651..17538116 100644
--- a/_benchmark/README.md
+++ b/_benchmark/README.md
@@ -6,22 +6,22 @@ Benchmark with [tak function](https://en.wikipedia.org/wiki/Tak_(function)) [^ta
 
 ```bash
 $ ruby tarai.rb
-go version go1.23.2 darwin/arm64
-ruby 3.3.5 (2024-09-03 revision ef084cc8f4) [arm64-darwin23]
+go version go1.24.1 darwin/arm64
+ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM [arm64-darwin24]
 Warming up --------------------------------------
           sequential     1.000 i/100ms
    parallel (Ractor)     1.000 i/100ms
     parallel (Fiber)     1.000 i/100ms
 parallel (goroutine)     1.000 i/100ms
 Calculating -------------------------------------
-          sequential      0.017 (± 0.0%) i/s    (57.84 s/i) -      1.000 in  57.844394s
-   parallel (Ractor)      0.052 (± 0.0%) i/s    (19.41 s/i) -      1.000 in  19.412980s
-    parallel (Fiber)      0.018 (± 0.0%) i/s    (56.78 s/i) -      1.000 in  56.780241s
-parallel (goroutine)      1.478 (± 0.0%) i/s  (676.40 ms/i) -      8.000 in   5.412528s
+          sequential      0.018 (± 0.0%) i/s    (56.40 s/i) -      1.000 in  56.397748s
+   parallel (Ractor)      0.052 (± 0.0%) i/s    (19.39 s/i) -      1.000 in  19.394641s
+    parallel (Fiber)      0.018 (± 0.0%) i/s    (56.42 s/i) -      1.000 in  56.417936s
+parallel (goroutine)      1.581 (± 0.0%) i/s  (632.49 ms/i) -      9.000 in   5.743819s
 
 Comparison:
-parallel (goroutine):        1.5 i/s
-   parallel (Ractor):        0.1 i/s - 28.70x  slower
-    parallel (Fiber):        0.0 i/s - 83.95x  slower
-          sequential:        0.0 i/s - 85.52x  slower
+parallel (goroutine):        1.6 i/s
+   parallel (Ractor):        0.1 i/s - 30.66x  slower
+          sequential:        0.0 i/s - 89.17x  slower
+    parallel (Fiber):        0.0 i/s - 89.20x  slower
 ```