Re: [PATCH] udevd: de-duplicate strings in rules

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On Tue, Nov 11, 2008 at 22:23, Kay Sievers <kay.sievers@xxxxxxxx> wrote:
> On Tue, Nov 11, 2008 at 21:20, Alan Jenkins <alan-jenkins@xxxxxxxxxxxxxx> wrote:
>> On my Ubuntu installation this removes 15k of duplicate strings,
>> using a temporary index of about 25k.
>
> Great. That looks nice.
>
> Thats's the diff of the rule dump before and after the patch:
>  ...
>  -[] shrunk to 64896 bytes tokens (5408 * 12 bytes), 57298 bytes buffer
>  -[] dumping 5408 (64896 bytes) tokens, 5818 (57298 bytes) strings
>  +[] shrunk to 64896 bytes tokens (5408 * 12 bytes), 18204 bytes buffer
>  +[] used 40512 bytes of string index nodes (844 * 48 bytes)
>  +[] dumping 5408 (64896 bytes) tokens, 1369 (18204 bytes) strings

I split the nodes and the childs in two independent arrays, so we got
rid of the limit of 10 childs per node. I've got ~200 fully uses slots
with the huge rules set here. Unlimited childs in the index removes
another 3 kB of duplicates, and the temporary index seems also a bit
smaller:
  shrunk to 64896 bytes tokens (5408 * 12 bytes), 15324 bytes buffer
  used 29456 bytes for index (1076 * 16 bytes nodes, 1020 * 12 bytes
child links)

Would be great, if you can check if it still works for you as expected. :)

Thanks,
Kay
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