From T216664
>>! In T216664#5193748, @Trizek-WMF wrote:
> @Reedy, I've just spotted [[ https://fr.wikipedia.org/wiki/Discussion_utilisateur:0x010C#Et_puis_d%C3%A9brouillez-vous | a conversation on a wiki ]]: that change is breaking some stuff ( displaying "Erreur Lua : not enough memory" [[ https://fr.wikipedia.org/wiki/Pleyber-Christ#Liens_externes | at the bottom of some articles ]]), and it is apparently due to [[ https://fr.wikipedia.org/w/index.php?title=Module:Donn%C3%A9es_Rang1975&action=history | templates you've created ]]. I haven't investigated more deeply.
A MW request can use 660MB memory. A Scribunto call only 50
My "fix" to the frwiki templates basically sacrificed memory to get much less CPU time... So the older parserfunctions version, could've potentially had access to much more memory to execute