[plt-scheme] Scheme productivity data point

Neil Van Dyke wrote:
> FYI, a small Scheme productivity data point that I just blogged...
>
>> Scheme Is Likely Fast Enough for You
>>
>> I needed to process a corpus of HTML files, which involved a bunch of 
>> parsing, XPath-ing, simple pattern-matching, a little regexp-ing, and 
>> HTML generation.
>>
>> Using PLT Scheme, Oleg Kiselyov's and Kirill Lisovsky's SXPath, Jim 
>> Bender's sxml-match, HtmlPrag, and WebScraperHelper, I banged it 
>> together in a day for a sample of the data, then spent another day 
>> tweaking it to run through the entire corpus. Most of the second day 
>> was due to some strangely bad HTML buried in some of the 40,000+ 
>> files, and having to juggle remote computers.
>>
>> Afterwards, half tongue-in-cheek, I played fanboy for the benefit of 
>> a colleague who still wants to do symbolic processing in C++, 
>> laboriously...
>>
>>> [...] The output files take less than 7% the space of the input files.
>>>

The input files were HTML and the output files were something.. but does 
that have anything to do with the fact that you used scheme? I don't see 
how the engine is a factor here, unless I missed something.