bug#61490: [PATCH v2] Increase BLOCK_ALIGN from 1024 to 32768

[Robert Pluim]

>>>>> On Thu, 16 Feb 2023 18:05:09 +0300, Konstantin Kharlamov 
>>>>> <Hi-Angel@yandex.ru> said:

    Konstantin> Originally discovered by Tyler Dodge in his article 
"Significant Garbage
    Konstantin> Collection Improvement For Emacs".

    Konstantin> While testing this change on Archlinux system with Intel 
i5-7200U CPU,
    Konstantin> average time of garbage collection gets reduced by ≈25%. Other 
users
    Konstantin> report improvements up to 50%. While monitoring PSS of emacs 
with and
    Konstantin> without customizations loaded before and after the patch, no
    Konstantin> statistically significant differences were discovered. So 
overall, this
    Konstantin> change is a win.

I havenʼt tested it yet, but it looks reasonable.

Procedural nit: if you put the bug number in the commit message rather
than the Subject, then 'git am' will strip the [PATCH v2] prefix for
us.

Robert
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