Category: Technology

I work in technology sector. And I do round a clock, not only from 9 to 5. It is my bread and butter, it is my hobby, it is the fascination of my life. And with the current rate of change particular in information technology (IT), there is always something new to learn, to try, to talk about. I often post news, thoughts, and reviews. And when I do, this is the category I use.

Why software projects take longer than you think – a statistical model

“Why software projects take longer than you think – a statistical model” is an interesting take on the problem of bad estimations in software projects. I’m not that great with math, but even then the article is very interesting. And there is a lot that I agree with.

Here’s a quote for those of you who couldn’t make it through:

Why software tasks always take longer than you think

Assuming this dataset is representative of software development (questionable!), we can infer some more numbers. We have the parameters for the t-distribution, so we can compute the mean time it takes to complete a task, without knowing the σ for that task is.


While the median blowup factor imputed from this fit is 1x (as before), the 99% percentile blowup factor is 32x, but if you go to 99.99% percentile, it’s a whopping 55 million! One (hand wavy) interpretation is that some tasks end up being essentially impossible to do. In fact, these extreme edge cases have such an outsize impact on the mean, that the mean blowup factor of any task ends up being infinite. This is pretty bad news for people trying to hit deadlines!

Intermediate Vim

Intermediate Vim is a nice collection of Vim tips and tricks, which are aimed at somebody who is already familiar with Vim. (There is of course no single definition of what’s advanced, intermediate or introductory, so we’ll leave that argument out.) But the article is well worth the read, even if you already know all of the mentioned commands. A refresher is always welcome.

Fedora 30

Fedora 30 has been released a few days ago. In the long list of changes, the most interesting to me are:

I’ve already upgraded my laptop to this version and everything seems to work as expected. The upgrade from Fedora 29 to Fedora 30 is easy:

# Install all the latest updates
dnf upgrade --refresh

# Install DNF plugin for system upgrades
dnf install dnf-plugin-system-upgrade

# Download all the necessary packages for Fedora 30
dnf system-upgrade download --releasever=30

# Reboot and start the upgrade of packages
dnf system-upgrade reboot

# Cleanup after successful upgrade
dnf system-upgrade clean

If this is not your first upgrade on the machine, it might also be a good idea to cleanup some of the installed packages BEFORE the upgrade, so that the process goes faster, skipping unnecessary downloads and upgrades. Here are a few suggestions:

# List all installed RPMs by size
rpm -qa --queryformat '%{size} %{name}\n' | sort -rn | less

# List all packages from earlier Fedora releases
rpm -qa | grep -i fc28

996.ICU

There has been some noise in the mass media about the 996.ICU (official website) recently. That’s good, but I think we can do better. So, spread the word!

Here are a few bits to get you started:

The name 996.ICU refers to “Work by ‘996’, sick in ICU”, an ironic saying among Chinese developers, which means that by following the “996” work schedule, you are risking yourself getting into the ICU (Intensive Care Unit).

What is 996?
A “996” work schedule refers to an unofficial work schedule (9 a.m.–9 p.m., 6 days per week) that has been gaining popularity. Serving a company that encourages the “996” work schedule usually means working for at least 60 hours per week. Visit 996 working hour system on Wikipedia for more details.

GitHub and Microsoft works support the 996.ICU initiative, as well as many other companies and teams.