Miscellaneous optimizations to reduce string copying

1 files changed, 1 insertions, 0 deletions

diff --git a/env.cpp b/env.cpp
index 13f87b6c..acf132c8 100644
--- a/env.cpp
+++ b/env.cpp
@@ -892,6 +892,7 @@ int env_set(const wcstring &key, const wchar_t *val, int var_mode)
     if (!is_universal)
     {
         event_t ev = event_t::variable_event(key);
+        ev.arguments.reserve(3);
         ev.arguments.push_back(L"VARIABLE");
         ev.arguments.push_back(L"SET");
         ev.arguments.push_back(key);