why
Timing code execution
Hello,
I just ran the following code to time how long a part of a function takes to execute:
time1 = NaiveDateTime.utc_now
...some code or function call...
time2 = NaiveDateTime.utc_now
time_total = NaiveDateTime.diff(time2, time1, :microsecond)
time_total came back remarkably low (two-digit microseconds). Quite plausible (and fascinating!), but might I be missing something with this logic, particularly if a function call is between time1 and time2?
Thank you.
Most Liked
NobbZ
Even though there are indeed benchmarking frameworks available, there is also :timer.tc/1,2,3 in Erlang.
For one time measurements, eg. for some progress report or sending to a metrics service, it’s usually sufficient.
tcoopman
If you want to do a micro benchmark (measure how long a function takes), doing one run of the function is not enough.
You can take a look at https://github.com/bencheeorg/benchee to run microbenchmarks.
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Producing high quality Elixir screencasts since 2017.
Categories:
Sub Categories:
Forums
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Practical resources that improve the lives of professional developers.
Enabling companies to succeed by building software people love.
The deployment platform built for Elixir: PaaS ease, VPS control.
Courses that'll move you from confusion to "Aha, now I get it!"