---input---
// this used to take ages
void foo() throws xxxxxxxxxxxxxxxxxxxxxx{ }

---tokens---
'// this used to take ages\n' Comment.Single

'void'        Keyword.Type
' '           Text
'foo'         Name.Function
'('           Punctuation
')'           Punctuation
' '           Text
'throws'      Keyword.Declaration
' '           Text
'xxxxxxxxxxxxxxxxxxxxxx' Name
'{'           Punctuation
' '           Text
'}'           Punctuation
'\n'          Text