From 0fddfd1ba530c954dc042c5d138de82ecd4e4ff1 Mon Sep 17 00:00:00 2001
From: mknapphrt <39998367+mknapphrt@users.noreply.github.com>
Date: Thu, 7 Nov 2024 15:46:38 -0500
Subject: [PATCH] Cache metricsfamily help text (#3175)

Signed-off-by: Mark Knapp <mknapp@hudson-trading.com>
---
 collector/textfile.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/collector/textfile.go b/collector/textfile.go
index 134083af..3e0cc459 100644
--- a/collector/textfile.go
+++ b/collector/textfile.go
@@ -253,10 +253,16 @@ func (c *textFileCollector) Update(ch chan<- prometheus.Metric) error {
 		}
 	}
 
+	mfHelp := make(map[string]*string)
 	for _, mf := range parsedFamilies {
 		if mf.Help == nil {
+			if help, ok := mfHelp[*mf.Name]; ok {
+				mf.Help = help
+				continue
+			}
 			help := fmt.Sprintf("Metric read from %s", strings.Join(metricsNamesToFiles[*mf.Name], ", "))
 			mf.Help = &help
+			mfHelp[*mf.Name] = &help
 		}
 	}