From e800af5c23607d6d5095d96b71978d3bcb6743e1 Mon Sep 17 00:00:00 2001
From: Yurii Zubrytskyi <zyy@google.com>
Date: Thu, 27 Jun 2019 13:47:17 -0700
Subject: [PATCH] [adb] Cache features set inside the client process

Test: manual
Change-Id: I99962edd85e9694c3ca309624368cda6355da008
---
 adb/client/adb_client.cpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/adb/client/adb_client.cpp b/adb/client/adb_client.cpp
index 7e408a87a..89dcb27c4 100644
--- a/adb/client/adb_client.cpp
+++ b/adb/client/adb_client.cpp
@@ -398,9 +398,15 @@ std::string format_host_command(const char* command) {
 }
 
 bool adb_get_feature_set(FeatureSet* feature_set, std::string* error) {
-    std::string result;
-    if (adb_query(format_host_command("features"), &result, error)) {
-        *feature_set = StringToFeatureSet(result);
+    static FeatureSet* features = nullptr;
+    if (!features) {
+        std::string result;
+        if (adb_query(format_host_command("features"), &result, error)) {
+            features = new FeatureSet(StringToFeatureSet(result));
+        }
+    }
+    if (features) {
+        *feature_set = *features;
         return true;
     }
     feature_set->clear();