From 3193d5c2d9c6935adba4d3866f7bb9ab1a85396a Mon Sep 17 00:00:00 2001
From: Arseny Smirnov <arseny30@gmail.com>
Date: Tue, 23 Apr 2019 10:42:46 +0300
Subject: [PATCH] Client: use several threads for multiple clients

GitOrigin-RevId: 180f2977371a5a13b35ca929918450f88efcfec5
---
 td/telegram/Client.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/td/telegram/Client.cpp b/td/telegram/Client.cpp
index 7ad4f4fd..b9e7d6d4 100644
--- a/td/telegram/Client.cpp
+++ b/td/telegram/Client.cpp
@@ -139,8 +139,13 @@ class MultiImpl {
  public:
   static std::shared_ptr<MultiImpl> get() {
     static std::mutex mutex;
-    static std::weak_ptr<MultiImpl> impl;
+    static std::vector<std::weak_ptr<MultiImpl> > impls;
     std::unique_lock<std::mutex> lock(mutex);
+    if (impls.size() == 0) {
+      impls.resize(clamp(thread::hardware_concurrency(), 8u, 1000u) * 5 / 4);
+    }
+    auto &impl = *std::min_element(impls.begin(), impls.end(),
+                                   [](auto &a, auto &b) { return a.lock().use_count() < b.lock().use_count(); });
     auto res = impl.lock();
     if (!res) {
       res = std::make_shared<MultiImpl>();