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Rémy,

On 1/21/18 2:17 PM, Rémy Maucherat wrote:
> On Sat, Jan 20, 2018 at 5:42 PM, Christopher Schultz < 
> ch...@christopherschultz.net> wrote:
> 
> Rémy,
> 
> On 1/19/18 11:18 AM, Rémy Maucherat wrote:
>>>> I had a look at performance with the CPU security fixes on
>>>> my Fedora 27. Although it is a bit early for final
>>>> conclusions, I can report that they have an impact for
>>>> Tomcat, but it doesn't seem it's as much as my initial
>>>> measurements. I chose to use HTTP/2 this time, it's more
>>>> complex.
>>>> 
>>>> h2load -n 100000 -c 10
>>>> 
>>>> PTI on:
>>>> 
>>>> docs/changelog.html NIO2: 17200 (sendfile, without it it is 
>>>> slightly below NIO) NIO: 9000 APR: 14450
>>>> 
>>>> /tomcat.gif NIO2: 52000 NIO: 47000 APR: 55000
>>>> 
>>>> PTI off:
>>>> 
>>>> docs/changelog.html NIO2: 19000 (sendfile) NIO: 9500
>>>> APR:16000
>>>> 
>>>> /tomcat.gif NIO2: 57000 NIO: 51000 APR: 59000
>>>> 
>>>> The APR connector performs very well here, especially on the
>>>> large file test.
> 
> This is all HTTPS, right (http/2 implies HTTPS). For NIO/NIO2,
> were you using OpenSSL or JSSE?
> 
> 
>> It's unencrypted h2c, I added that support to be able to use
>> h2load with Tomcat.
> 
> 
> 
> The numbers shown above are ... requests/sec?
> 
> 
>> Yes, but it doesn't matter much ;)

Well, it would make a big difference if it was total request time
(1.g. 10k requests). It would flip the logic around and make it look
like a CPU performance improvement ;)

- -chris
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