For API annotations I am working in the details of RdrNames, which come in a bewildering variety of syntactic forms. My latest change causes perf/compiler to fail, with bytes allocated value is too high: Expected parsing001(normal) bytes allocated: 587079016 +/-5% Lower bound parsing001(normal) bytes allocated: 557725065 Upper bound parsing001(normal) bytes allocated: 616432967 Actual parsing001(normal) bytes allocated: 704940512 Deviation parsing001(normal) bytes allocated: 20.1 % I am now adding an `AnnVal` to every RdrName, to be able to separate it out from any decoration, such as surrounding backticks or parens. Is this a problem? The alternative would be to add a SourceText field to RdrName. Alan