diff --git a/src/main.rs b/src/main.rs
index 3c2110f..135d442 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -64,12 +64,14 @@ impl From<EncodingError> for CifError {
 
 type Result<T> = std::result::Result<T, CifError>;
 
+#[inline]
 fn join_to_arraystring<const C: usize>(elems: &[&str], str: &mut ArrayString<C>) -> Result<()> {
     for (i, item) in elems.iter().enumerate() {
         if i > 0 {
             str.try_push(' ')?;
         }
         str.try_push_str(item)?;
+        //str.push_str(item);
     }
     Ok(())
 }
@@ -85,6 +87,7 @@ fn lines_read_noempty<T: UnsafeBufRead>(lines: &mut UnsafeLines<T>) -> Result<Op
     Ok(None)
 }
 
+#[inline]
 fn assert_trailing_leading(s: &str) -> Result<()> {
     if s.is_empty() || s.as_bytes()[0] == 32 || s.as_bytes()[s.len() - 1] == 32 {
         return Err(IllegalWhitespaceError(s.to_string()))