Re: hmtx optimization over the Google Fonts collection

Sure.  But I'm sure they are interested in taking a look :)

On Wed, Jan 20, 2016 at 6:58 PM, Roderick Sheeter <rsheeter@google.com>
wrote:

> Yup, will do. Fingers crossed they can work further magic for us :D
>
> However, I would think this expected behavior as it's hard to predict how
> well brotli can compress a given input.
>
>
> On Wed, Jan 20, 2016 at 9:27 AM, Behdad Esfahbod <behdad@google.com>
> wrote:
>
>> Right... But the ones, say, growing 2k in size are interesting.  Can you
>> ping Brotli people so they are at least aware of this?
>>
>> On Wed, Jan 20, 2016 at 6:13 PM, Roderick Sheeter <rsheeter@google.com>
>> wrote:
>>
>>> I think it's because the result is can be an input buffer that is less
>>> friendly to brotli.
>>>
>>> To give an example, lets take ArbutusSlab-Regular.ttf. It's hmtx barely
>>> saves anything (Was 1734 now 1733 [bytes]). The main compression step gets
>>> a smaller input but isn't able to compress it quite as well:
>>>
>>> hmtx_opt: Compressed 63150 to 29992.
>>> not opt: Compressed 63151 to 29939.
>>>
>>> Plus we need an additional UIntBase128 to store the transform length.
>>>
>>> On Wed, Jan 20, 2016 at 9:03 AM, Behdad Esfahbod <behdad@google.com>
>>> wrote:
>>>
>>>> Hey,
>>>>
>>>> I'm sure everyone wants to know: why would any font get larger?
>>>>
>>>> On Wed, Jan 20, 2016 at 5:45 PM, Roderick Sheeter <rsheeter@google.com>
>>>> wrote:
>>>>
>>>>> I did a test run of hmtx optimization over the Google Fonts
>>>>> collection and thought the results might be of interest. A few key results:
>>>>>
>>>>>    - Of 1754 font files, 80.4% (1411) got smaller, 16.4% (288) had no
>>>>>    change, and 3.1% (55) got larger.
>>>>>    - For fonts with savings, average was 466 bytes or 1.08% of size
>>>>>       - Across all fonts, average was 368 bytes or 0.86% of size
>>>>>
>>>>> Cheers, Rod S.
>>>>>
>>>>> Per-font results can be seen in
>>>>> https://docs.google.com/spreadsheets/d/1dgL-il6fIHaHJghlzXz7aM_HEtes9G7Pt7TsnlsxsGc/edit?usp=sharing
>>>>> .
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>