Re: docs: requirements.txt has stopped working again

[Akira Yokosawa <akiyks@gmail.com>]

On Thu, 25 Jan 2024 00:43:51 +0900, Akira Yokosawa wrote:
> On Wed, 24 Jan 2024 08:25:57 -0700, Jonathan Corbet wrote:
>> Akira Yokosawa <akiyks@gmail.com> writes:
[...]
>>> VM spec used: memory: 8GB, threads: 4, ubuntu jammy
>>>
>>> data in each cell: elapsed time, max resident memory
>>>
>>>                                     v2.4.5        v4.3.2        v7.2.6
>>>   =============================  ============  ============  ============
>>>   clean build at v6.7            10m08s 3.3GB  10m31s 1.1GB  10m14s 1.2GB
>>>   incremental build at v6.8-rc1  11m22s 3.3GB  18m55s 1.2GB  19m50s 1.4GB
>>>   clean build at v6.8-rc1        10m45s 3.2GB  10m32s 1.2GB  10m13s 1.3GB
>>>
>>>   empty make at v6.8-rc1         3.3s          6.6s          7.0s
>>>   =============================  ============  ============  ============
>>
>> So that is quite different from my experience.  For me, full builds got
>> way slower starting with 3.x and haven't improved much since, though
>> I've not played much with 7.x yet.
> 
> One of the reasons I can think of why 2.4.5 is not faster is
> the "make -j2" I need to use.  2.4.x is way more eager to use
> more parallel slots than >=3.1 in later stages of its processing.
> I think you have a memory rich system that allows a lot of parallel
> slots.  On a machine with 16GB memory, I can say -j4 (or -j5 if
> I am lucky).
> 

So, I managed to run v2.4.5 with 4 threads.
Also, I ran incremental builds of small diffs at the docs-6.8-fixes
tag relative to v6.8-rc1.

Here is the updated table.

-----------------------------------------
VM spec used: memory: 10GB, threads: 4, ubuntu jammy
data in each cell: elapsed time, max resident memory

                                    v2.4.5       v4.3.2        v7.2.6
 ============================   ===========  ============  ============
 full build at v6.7             6m14s 2.3GB  10m31s 1.1GB  10m14s 1.2GB
 incr build at v6.8-rc1         7m26s 2.5GB  18m55s 1.2GB  19m50s 1.4GB
 full build at v6.8-rc1         6m45s 2.4GB  10m32s 1.2GB  10m13s 1.3GB
 incr build at docs-6.8-fixes   4m58s 2.2GB   6m50s 1.2GB   6m45s 1.3GB

 empty make at v6.8-rc1         3.3s         6.6s          7.0s
 ============================   ===========  ============  ============

This should be close to the reality.

HTH, Akira