Fix missing <algorithm> include for std::generate_n in performance tests

test/perftests/client.cpp

@@ -32,6 +32,7 @@
 #include <thread>
 #include <chrono>
 #include <cassert>
+#include <algorithm>
 
 using namespace std::chrono_literals;
 

test/perftests/server.cpp

@@ -29,6 +29,7 @@
 #include <string>
 #include <thread>
 #include <chrono>
+#include <algorithm>
 
 using namespace std::chrono_literals;