From 7df7afb0a487b0abde9e1c0ffdfd1d7fb457360b Mon Sep 17 00:00:00 2001
From: Adam Sitnik <adam.sitnik@gmail.com>
Date: Wed, 19 Jan 2022 10:50:00 +0100
Subject: [PATCH] add benchmarks for File.ReadAllLines* methods

---
 .../libraries/System.IO.FileSystem/Perf.File.cs     | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.File.cs b/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.File.cs
index 859da2eb2d2..6b37f31dec2 100644
--- a/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.File.cs
+++ b/src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.File.cs
@@ -143,6 +143,19 @@ public void CleanupReadAllBytes()
         public Task<byte[]> ReadAllBytesAsync(int size) => File.ReadAllBytesAsync(_filesToRead[size]);
 #endif
 
+        [GlobalSetup(Targets = new[] { nameof(ReadAllLines), "ReadAllLinesAsync" })]
+        public void SetupReadAllLines()
+            => File.WriteAllLines(_testFilePath = FileUtils.GetTestFilePath(), ValuesGenerator.ArrayOfStrings(count: 100, minLength: 20, maxLength: 80));
+
+        [Benchmark]
+        public string[] ReadAllLines() => File.ReadAllLines(_testFilePath);
+
+#if !NETFRAMEWORK
+        [BenchmarkCategory(Categories.NoWASM)]
+        [Benchmark]
+        public Task<string[]> ReadAllLinesAsync() => File.ReadAllLinesAsync(_testFilePath);
+#endif
+
         [GlobalSetup(Targets = new[] { nameof(AppendAllLines), "AppendAllLinesAsync" })]
         public void SetupAppendAllLines()
         {