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-rw-r--r--libbuild2/script/run.cxx2
1 files changed, 2 insertions, 0 deletions
diff --git a/libbuild2/script/run.cxx b/libbuild2/script/run.cxx
index 1971bd1..0d9e472 100644
--- a/libbuild2/script/run.cxx
+++ b/libbuild2/script/run.cxx
@@ -1015,6 +1015,8 @@ namespace build2
//
// Set the empty_ flag to false after the first character is read.
//
+ // @@ PERF: reading one character at a time is not ideal.
+ //
auto get = [this] () -> optional<char>
{
char r;