Re: [Bug-wget] Benchmarking

[Tim Rühsen]

Hi Marcel,

wget1.x can only download one file at a time. Of course you can use
multiple instances in parallel.

Wget2 uses 5 parallel threads per default (can be tuned with
--max-threads=N), so no need for parallel instances. If you give e.g. 5
or less URLs, they are downloaded in parallel without the need for tuning.
Here comes a little complication... HTTP/2 behaves slightly different
than HTTP/1.1 as it allows parallel requests (streams) on one connection
- if all URLs have the same domain.

Next, Wget2 has a stats module that allows to generate one data record
per URL including timings (millisecond precision), see --stats-site.

In the Wget2 repository are also some benchmark scripts in subdir
benchmarks/.

Example:
$ wget2 --stats-site=csv:- www.gnu.org www.heise.de www.oracle.de
...
ID,ParentID,URL,Status,Link,Method,Size,SizeDecompressed,TransferTime,ResponseTime,Encoding,Verification,Last-Modified,Content-Type
1,0,http://www.gnu.org,200,1,1,9168,28592,235,234,1,0,0,text/html
2,0,https://www.heise.de,200,1,1,58158,434935,53,27,1,0,1568496351,text/html
3,0,http://www.oracle.de,301,1,1,217,270,341,341,1,0,0,text/html
4,0,http://www.oracle.com/de/index.html,301,0,1,0,0,180,180,0,0,0,(null)
5,0,https://www.oracle.com/de/index.html,200,0,1,8511,32215,160,160,1,0,1568450074,text/html

It also records the redirections as you can see. See docs/wget2.md for
more info regarding the fields.

Regards, Tim

On 14.09.19 17:33, Schaible, Marcel wrote:
> Hi,
> 
> 
> I am wondering if wget is capable of being used as a benchmark tool for web 
> servers.
> 
> 
> I just come back from a programming course for beginners and we have setup 
> for the  attendees a small webserver (nginx) as download hub for some 
> installation packages. The server was dead slow and practically unusable. For 
> the next course I want to test this upfront.
> 
> 
> So I am looking for some wget options to start a couple of concurrecnt 
> connections to my server and download files, preferable a set of different 
> files.
> 
> 
> Can this be done with wget.
> 
> 
> Thanks
> 
> 
> Marcel
>

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