We have a very large site and have recently gone through the process of upgrading the Hugo version we are using from 0.126.1 to 0.156.0. We found that our build jobs went from taking around 10 minutes to over 16 minutes. This extra time came mainly from the Hugo build step which went from 240077ms …

I have looked at the changes in v0.128.0, and there’s only one candidate for this performance regression (the templates.Defer feature). I see some inefficiencies with that code, and I will have a fix for it out in the next Hugo (which should be out in a few days). I’m cannot be 100% sure that this w…

The repo is GitHub - mendix/docs: Mendix documentation repository · GitHub It publishes to https://docs.mendix.com/ (Sorry I didn’t include these earlier).

Can you explain how to set this up? I’ve cloned the repo and run npm i, then when I try to build with v0.128.0: WARN Module "docsy" is not compatible with this Hugo version: Min 0.146.0 extended; run "hugo mod graph" for more information. Start building sites … hugo v0.128.0-e6d2712ee062321dc2fc4…

There are instructions in the README here: GitHub - mendix/docs: Mendix documentation repository · GitHub but that won’t help you run 0.126.0. You will need to clone the repo from commit d05683d4eb5c034bfbb19167fe9384973a111e2c to get the version before we upgraded Hugo and Docsy when you should be…

Can you reproduce the problem with the latest version of Hugo combined with the latest version of Docsy? I would not like to spend time testing the wrong things.

hugo WARN deprecated: project config key languageCode was deprecated in Hugo v0.158.0 and will be removed in a future release. Use locale instead. WARN deprecated: project config key languages.en.languageName was deprecated in Hugo v0.158.0 and will be removed in a future release. Use languages.en…

Yes, it still takes a long time (600000ms) using 0.163.3. You should be able to build the latest commit using 0.164.0 but you can’t build the commit I gave you with 0.164.0 because there were various additional constraints and we corrected some errors which the later version of Hugo was finding. O…

There are two branches on our site which I have been using for testing. GitHub - mendix/docs at MvM-HugoTests156 · GitHub works for the latest Hugo version. GitHub - mendix/docs at MvM-HugoTests · GitHub works for versions around 0.127.0/0.128.0 which is where the slowdown appeared. Unfortunately…

I’ll look at this again later when I have more time, but I strongly encourage you to get to the point where you can test the latest version of Hugo with the latest version of Docsy with the latest version of your project.

jmooring@ubuntu:~/temp/docs (MvM-HugoTests156)$ hugo WARN deprecated: project config key languageCode was deprecated in Hugo v0.158.0 and will be removed in a future release. Use locale instead. WARN deprecated: project config key languages.en.languageName was deprecated in Hugo v0.158.0 and wil…

If you take our development branch and bump Hugo to 0.163.3 then it runs (with some deprecation warnings). What you can’t do is go back to before 0.128.0 to see that the same site is built in less than half the time. My original post has the output from a build of 0.163.3. It builds the same site a…

Hugo building slowly from release 0.128.0

support

jmooring July 6, 2026, 6:08pm 20

This was addressed in v0.164.0 with #15085.

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Hugo building slowly from release 0.128.0

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