From 83533dd4aee774e5470a0253f7de1cbf4ab37bd1 Mon Sep 17 00:00:00 2001
From: Kevin Longe <273747162+kvlonge@users.noreply.github.com>
Date: Tue, 10 Nov 2026 00:42:59 +0000
Subject: [PATCH] test(perf): set the dense guard calibration reference below
 the EPYC 7763's readings

The 0.55 s reference sat inside the EPYC 7763's own calibration readings
(0.540 s to 0.62 s), so whether a 7763 run got a larger budget depended
on noise, while its warm and edit medians sit right at the unscaled
budgets. At 0.50 s every 7763 reading scales the budgets by at least
1.08. Classes the budgets fit keep a factor of at most 1.04.
---
 .../e2e/src/sqlbuild/cli/commands/main/compile/helpers.py  | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tests/e2e/src/sqlbuild/cli/commands/main/compile/helpers.py b/tests/e2e/src/sqlbuild/cli/commands/main/compile/helpers.py
index dda68d48d..0126958e7 100644
--- a/tests/e2e/src/sqlbuild/cli/commands/main/compile/helpers.py
+++ b/tests/e2e/src/sqlbuild/cli/commands/main/compile/helpers.py
@@ -1122,10 +1122,11 @@ def median_wall_seconds(results: tuple[FreshProcessCompileBenchmarkResult, ...])
     return statistics.median(result.elapsed_seconds for result in results)
 
 
-# The slowest fastest-repetition seen on the hosted runner classes the dense budgets fit as they
-# are. A measurably slower runner scales the budgets by its own fastest repetition over this; a
+# Near the top of the hosted runner classes the dense budgets fit as they are, and below every
+# reading of the slower EPYC 7763 class, so that class's run-to-run noise never leaves it without
+# a larger budget. A slower runner scales the budgets by its own fastest repetition over this; a
 # faster one keeps them unchanged.
-_RUNNER_CALIBRATION_REFERENCE_SECONDS: float = 0.55
+_RUNNER_CALIBRATION_REFERENCE_SECONDS: float = 0.50
 _RUNNER_CALIBRATION_CHECKSUM: int = 2910182
 _RUNNER_CALIBRATION_REPETITIONS: int = 7
 _RUNNER_CALIBRATION_VALUES: int = 600_000