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Good work and improved a lot.


What I would like to do to end it is to thank the folks who actually did
the engineering work behind the work.
How would that best be?



It would be great. It would be great to inform the variation in the performance depending on the 
spreadsheet content.


Sincerely,
Sreekanth V K

Sent with ProtonMail Secure Email.

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, January 21, 2019 6:05 AM, Drew Jensen <drewjensen.inbox@gmail.com> wrote:


OK - it's Sunday night and after a week this is where this is at.

Added a few lines to the script.

----------------------------------------------------------------------------------------------------

LibreOffice 6.2 becomes the second release to offer multi-core threading as
standard feature.

With threading support spreadsheet calculation performance is significantly
enhanced.

In this video we will use an example file from the Architectural profession.

Our example spreadsheet contains 234,000 data points used to compute ETTV
(Envelope Thermal Transfer Value) for an entire building.

We are using a representative office computer with AMD 4 core processor and
8GB of ram and Ubuntu 18.04 operating system.

A full recalc of the Building Design spreadsheet using LibreOffice 6.0.7
takes 50.14 sec,

the same file using LibreOffice 6.2.0, with multi-core threading, only
12.06 seconds.

A 75.95% performance increase!

How much of a performance increase will you see in your Calc worksheets?

This depends largely on how calculation heavy your work is.

Representative benchmark spreadsheets covering scenarios from Stock Pricing
to Water Table Monitoring

produced performance increases ranging from 37% to 75% with this 4 core
processor based system.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Kept the graphics layout and put another quick read of a voice over. Used a
tool to strip out excess blank space in the audio and got a bit over
zealous with it, but good enough for a draft.
Which is here: https://youtu.be/WBGLyogqKYI

What I would like to do to end it is to thank the folks who actually did
the engineering work behind the work.
How would that best be?

Thanks

Drew

On Sun, Jan 20, 2019 at 9:38 AM Drew Jensen drewjensen.inbox@gmail.com
wrote:


Otherwise not sure if the noise is because it's not that bad or not that
good..
Anyway - a little self critiquing on the graphics and layout and here one
more pass over the material.
So if you look at what I have now it begs the question - what to put on
the end of it?
First, I thought it would be good to mention that not every spread sheet
is going to see a 76% performance increase in re-calcs.
I figure the easiest way is to reference the other 4 files and the numbers
from them.
Yes?
So - here is the latest draft https://youtu.be/_aClBaBCdYE
On Wed, Jan 16, 2019 at 8:37 PM Drew Jensen drewjensen.inbox@gmail.com
wrote:


So I wrote a first draft of a script; short and simple

-------------------------------------------------------

LibreOffice 6.2 will be the second release to offer multi-core threading
as a standard feature.
With threading support spreadsheet calculation performance is
significantly enhanced.
In this video we will use an example file from the Architectural
profession.
Our example spreadsheet contains 234,000 data points used to compute ETTV
(Envelope Thermal Transfer Value) for an entire building.
We are using a representative office computer with AMD 4 core processor
and 8GB of ram and Ubuntu 18.04 operating system.
A full recalc of the Building Design spreadsheet using LibreOffice 6.0.7
takes 50.14 sec,
the same file using LibreOffice 6.2.0, with multi-core threading, only
12.06 seconds.

A 75.95% performance increase!

-------------------------------

Used my poor quality microphone capture of reading the script and got it
down to 42 seconds.
Put a a nightly rush video to that https://youtu.be/suRcgtBos9A
On Wed, Jan 16, 2019 at 1:22 PM Drew Jensen drewjensen.inbox@gmail.com
wrote:


Before I forget - the files used for to gather these runtime numbers,
posted in an earlier email, are found here:
https://gerrit.libreoffice.org/#/admin/projects/benchmark
There are five xls files with an explanation as to what the spreadsheet
is evaluating.
They are 4 years old and seem to be as good as I've found for example
files to show the multi-core threading feature.
Seems to me it might be worthwhile to offer them for download (maybe as
a zip file) and reference that download location in the video and/or
associated posting text.
Also, yesterday I went back and reviewed a number of the blog posts and
a few media posts regarding threading (OpenCL and Multi-Core), thought that
was a good first step in writing up a script for use here.
Have also gone through the Calc Functions list, as supplied in the Calc
Guide (updating it from 4.1 - 6.2) and have marked which functions are
thread enabled and which are not - not sure I have an exhaustive list but
should be close if not there. That is not really a marketing issue but in a
marketing piece listing the categories of statistical functions supporting
the feature seems to make sense.
OK - that's it for this email.
On Tue, Jan 15, 2019 at 2:32 PM Drew Jensen drewjensen.inbox@gmail.com
wrote:


Howdy,
On Mon, Jan 14, 2019 at 2:17 AM Sreekanth V K <
sreekanth.vettikkadu@protonmail.com> wrote:


The last one looks good for me. However, the operation which is
happening is not visible, so for a common person, he/she may not be able to
understand the difference. It would be better if you have the Calc in the
background (not just writing what is going on) and keep the system monitor
over the Calc.


Thanks for the feedback - the current drafts certainly lack context.
The spreadsheet itself doesn't give much if any visual clues as to what is
happening. It was my goal to use the System Monitor screen capture to show
what is actually happening here. In the one case (LibreOffice versions
without threading) you can see that a single processing is spiking to 100%
for most of the work time, and compare that to LibreOffice 6.2 spreading
the load across all for processors with each running at ~60% maximum while
finishing the actual task significantly faster.
That said I agree with you that there needs to be more to explain what
they are seeing.
Best wishes,
Drew


Sincerely,
Sreekanth V K
Sent with ProtonMail Secure Email.
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, January 14, 2019 12:10 PM, Drew Jensen <
drewjensen.inbox@gmail.com> wrote:


and I kept at it for a little while,
So a real first draft, I put the two runs one after so the run
length went
to 1:13
https://youtu.be/_jtmydRYSoU
The sound track is not quite right, some popping with the car engine
mix,
but you get the idea.
What do you think?
and now it is no longer Sunday here,
Drew
On Sun, Jan 13, 2019 at 11:37 PM Drew Jensen
drewjensen.inbox@gmail.com
wrote:


Sorry, lets try that URL again for the second file
https://youtu.be/ED-zipIV1dE
On Sun, Jan 13, 2019 at 11:34 PM Drew Jensen
drewjensen.inbox@gmail.com



wrote:


Of course there had another one in there, heck it isn't just a
Sunday it



is a snowy Sunday where I'm at.
so four versions of LO on the screen, from top left and running
clockwise



6.0, 6.1, 6.3 alpha, 6.2 RC2
this time the version number is overlaid the cpu monitor screen
captures



and fade out, in timing similar to the calculation time...
https://youtu.be/FMSPMWGdNO0
Anyway - realizing calculation threading became standard last
release I



was thinking it worth a mention in a social media post for the
coming 6.2



as the developers have continued working on the feature.
So, these are some first ideas for a video to go along with that
TBD post



text.
Suppose I'm asking if folks this would be worth the effort?
Best wishes,
Drew
On Sun, Jan 13, 2019 at 10:29 PM Drew Jensen
drewjensen.inbox@gmail.com



wrote:


Howdy,
What you think about something to highlight the work going
into speeding



up Calc..
I was playing with some of the test files available in the
source tree.



This particular file recalculates in half the time using LO
6.2 RC2 as



compared to 6.0.7 on the machine here.
How to show that graphically, me thought.
After a few minutes of fiddling came up this.
https://youtu.be/FMSPMWGdNO0
Too rough to share?
Drew


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