Added bench/roulette.lua

This benchmark exhibits non-deterministic performance.
eugeneia · Oct 8, 2016 · b0a75b4 · b0a75b4
1 parent c3224bb
commit b0a75b4
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/bench/roulette.lua b/bench/roulette.lua
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+-- Russian Roulette simulator
+-- This benchmark includes randomness from an external source that can
+-- produce non-deterministic performance.
+-- See https://github.com/LuaJIT/LuaJIT/issues/218
+
+math.randomseed(os.time())
+
+local population = 100e6
+local live = 0
+local die  = 0
+
+for i = 1, population do
+   if math.random(6) == 6 then
+      die = die + 1
+   else
+      live = live + 1
+   end
+end
+
+print(("Survived %d/%d (%.3f%%)"):format(live, population, live*100/(live+die)))