From a09778b4a53387400f7083ec0423d7e31a08a31a Mon Sep 17 00:00:00 2001
From: Thomas1664 <46387399+Thomas1664@users.noreply.github.com>
Date: Wed, 1 May 2024 15:52:29 +0200
Subject: [PATCH] [portsdiff] Optimize for identical commits

---
 src/vcpkg/commands.portsdiff.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/vcpkg/commands.portsdiff.cpp b/src/vcpkg/commands.portsdiff.cpp
index def776f9dd..f81a433184 100644
--- a/src/vcpkg/commands.portsdiff.cpp
+++ b/src/vcpkg/commands.portsdiff.cpp
@@ -172,6 +172,12 @@ namespace vcpkg
         const StringView git_commit_id_for_current_snapshot =
             parsed.command_arguments.size() < 2 ? StringLiteral{"HEAD"} : StringView{parsed.command_arguments[1]};
 
+        if (git_commit_id_for_previous_snapshot == git_commit_id_for_current_snapshot)
+        {
+            msg::println(msgPortsNoDiff);
+            Checks::exit_success(VCPKG_LINE_INFO);
+        }
+
         const auto portsdiff =
             find_portsdiff(paths, git_commit_id_for_previous_snapshot, git_commit_id_for_current_snapshot);
         const auto& added_ports = portsdiff.added_ports;