From 09bda4ceb592801d1729a2e7b4aea164dc855f6d Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 22 Mar 2023 17:58:49 +0900
Subject: [PATCH] core_assertions.rb: Refine `assert_linear_performance`

* Calculate each timeout from the ratio of each factor to the first
  factor.
---
 tool/lib/core_assertions.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tool/lib/core_assertions.rb b/tool/lib/core_assertions.rb
index d9d633a0ac..1662024e7d 100644
--- a/tool/lib/core_assertions.rb
+++ b/tool/lib/core_assertions.rb
@@ -760,7 +760,7 @@ eom
 
         seq.each do |i|
           next if i == first
-          t = (tmax * i).to_f
+          t = tmax * i.fdiv(first)
           *arg = pre.call(i)
           message = "[#{i}]: in #{t}s"
           Timeout.timeout(t, nil, message) do