Silence assert_slower_by_at_most by default

Tests shouldn't have any output if they pass.

Author: byroot

activerecord/test/cases/encryption/helper.rb

@@ -112,7 +112,7 @@ module PerformanceHelpers
     #     assert_slower_by_at_most 2, baseline: baseline do
     #       <the code you want to compare against the baseline>
     #     end
-    def assert_slower_by_at_most(threshold_factor, baseline:, baseline_label: BASELINE_LABEL, code_to_test_label: CODE_TO_TEST_LABEL, duration: BENCHMARK_DURATION, quiet: false, &block_to_test)
+    def assert_slower_by_at_most(threshold_factor, baseline:, baseline_label: BASELINE_LABEL, code_to_test_label: CODE_TO_TEST_LABEL, duration: BENCHMARK_DURATION, quiet: true, &block_to_test)
       GC.start
 
       result = nil
@@ -125,13 +125,15 @@ def assert_slower_by_at_most(threshold_factor, baseline:, baseline_label: BASELI
         end
       end
 
-      puts "#{output}#{error}" unless quiet
-
       baseline_result = result.entries.find { |entry| entry.label == baseline_label }
       code_to_test_result = result.entries.find { |entry| entry.label == code_to_test_label }
 
       times_slower = baseline_result.ips / code_to_test_result.ips
 
+      if !quiet || times_slower >= threshold_factor
+        puts "#{output}#{error}"
+      end
+
       assert times_slower < threshold_factor, "Expecting #{threshold_factor} times slower at most, but got #{times_slower} times slower"
     end
   end