[BuildStream] Weekly Performance Update

[Tom Pollard <tom pollard codethink co uk>]

Hi, sorry for the delay, we had to perform an update to the CI.

Here are the results for last week (10/10/19).

-------------------------------------------------
Ipython notebook with the results:
https://mybinder.org/v2/gl/BuildStream%2Fbenchmarking%2Fbst-benchmarks-notebooks/master?filepath=all_results.ipynb

the results are hosted at:
https://hub.gke.mybinder.org/user/buildstream-ben-marks-notebooks-zu90x2vy/notebooks/all_results.ipynb

Don't forget to run "Kernel" -> "Restart and Run all" to actually
generate the graphs.

Note: If the link has expired, you'll need to go to
https://mybinder.org/ and enter:
https://gitlab.com/BuildStream/benchmarking/bst-benchmarks-notebooks 
into the url
field, with branch "master" and file "all_results.ipynb". Then "launch".

---

All results were obtained on the same hardware (a Codethink dev
machine configured as a GitLab runner - not being used for anything
else), and the results files are being appended to by a CI job. Specs
as follows:

* Linux (Debian stretch)
* x86_64
* 16G RAM
* 500Gb SSD
* Intel i7-3770
* 8 cores @ 3.40 GHz

---

Here are the times and max-rss (peak memory usage) results for a `bst
show` of base-files/base-files.bst in the Debian-like project (branch:
jennis/add_all_files [1]) for the last 5 weeks:

┌────────────────┬─────────────────────────────────┬─────────────────────────────────┐
│                │              Show               │         Show once 
built         │
├────────────────┼────────────────┬────────────────┼────────────────┬────────────────┤
│     Dates      │    Time (s)    │  Memory (MiB)  │    Time (s)    │  
Memory (MiB)  │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 07/10 -> 13/10 │ 201.0          │ 6.48           │ 230.0          │ 
6.81           │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 14/10 -> 20/10 │ 201.0          │ 6.43           │ 230.0          │ 
6.74           │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 21/10 -> 27/10 │ 202.0          │ 6.44           │ 231.0          │ 
6.79           │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 28/10 -> 03/11 │ 203.0          │ 6.5            │ 232.0          │ 
6.76           │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 04/11 -> 10/11 │ 204.0          │ 6.45           │ 232.0          │ 
7.81           │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤


---

Here are the times and max-rss results for a `bst build` (4, 8 and 12
builders) of base-files/base-files.bst in the Debian-like project
(branch: jennis/add_all_files [1]):

┌────────────────┬─────────────────────────────────┬─────────────────────────────────┬─────────────────────────────────┐
│                │           4 Builders            │           8 
Builders            │           12 Builders           │
├────────────────┼────────────────┬────────────────┼────────────────┬────────────────┼────────────────┬────────────────┤
│     Dates      │    Time (s)    │  Memory (MiB)  │    Time (s)    │  
Memory (MiB)  │    Time (s)    │  Memory (MiB)  │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 07/10 -> 13/10 │ 228.0          │ 132.75         │ 228.0          │ 
134.59         │ 228.0          │ 133.11         │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 14/10 -> 20/10 │ 228.0          │ 133.42         │ 228.0          │ 
136.9          │ 228.0          │ 134.72         │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 21/10 -> 27/10 │ 228.0          │ 135.44         │ 228.0          │ 
137.26         │ 228.0          │ 134.83         │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 28/10 -> 03/11 │ 229.0          │ 132.43         │ 229.0          │ 
134.25         │ 229.0          │ 131.26         │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤
│ 04/11 -> 10/11 │ 230.0          │ 144.46         │ 230.0          │ 
148.33         │ 230.0          │ 145.5          │
├────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┼────────────────┤


---

Please see [2] if you're unable to open the weekly notebook locally.

[1] 
https://gitlab.com/BuildStream/benchmarking/debian-stretch-bst/tree/jennis/add_all_files
[2] 
https://mail.gnome.org/archives/buildstream-list/2019-February/msg00046.html