From 09b05192fa334d4ba711045f7b6ed1b61deff8dc Mon Sep 17 00:00:00 2001
From: Tom Gasson <tgasson@atlassian.com>
Date: Tue, 3 Sep 2024 13:03:27 +1000
Subject: [PATCH] Shortcut hash computation for constant rules

This reduces the number of hashing operations performed substantially
---
 src/Evaluator.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Evaluator.ts b/src/Evaluator.ts
index c065cd7..203e7a0 100644
--- a/src/Evaluator.ts
+++ b/src/Evaluator.ts
@@ -826,6 +826,12 @@ export default class Evaluator {
   }
 
   _evalPassPercent(user: StatsigUser, rule: ConfigRule, config: ConfigSpec) {
+    if (rule.passPercentage === 0) {
+      return false;
+    }
+    if (rule.passPercentage === 100) {
+      return true;
+    }
     const hash = computeUserHash(
       config.salt +
         '.' +