[Touch-packages] [Bug 1123272] Re: high cpu usage on download (not optimised SHA256, SHA512, SHA1)

2017-07-18 Thread Travis Johnson
This seems to be a bit of a bikeshed on specific implementation options. The problem here is downloads pin the CPU, and in my personal experience I can download the same files via curl with nothing close to a CPU bottleneck. I do not know how you benchmarked APT but this may be a case of a micro b

[Touch-packages] [Bug 1123272] Re: high cpu usage on download (not optimised SHA256, SHA512, SHA1)

2017-07-18 Thread Travis Johnson
I am not satisfied with this response: I experience CPU bottlenecking on ec2 server instances. Gigabit networking with CPUs sub-3ghz is incredibly common place (read: entirety of server ecosystem), so I'm not sure what you mean by "usual" network bandwidths. -- You received this bug notification

[Touch-packages] [Bug 1123272] Re: high cpu usage on download (not optimised SHA256, SHA512, SHA1)

2016-08-03 Thread Travis Johnson
I believe this is still present in 16.04. Specifically I become CPU bottlenecked (100% on one core by /usr/lib/apt/methods/http) when downloading packages within AWS EC2 instances (better bandwidth with download servers there). Besides the issues around locking up a core, this makes several process