Monday, February 23, 2015

Perl is Dying

I like Perl. It's been a part of my life for over 14 years, since I had 5.6.0 on Red Hat 7.0. (Funny how Red Hat Enterprise is now 7.0, and the desktop project hasn't borne the name for over twenty releases.)

But, I'm getting the distinct impression that the language is losing its community. It seems to be getting too small to keep up with the nice things.

Case in point: AWS. Trawl metacpan.org, and there's no coherent set of packages for using Amazon services. There are some Net::Amazon modules, some Amazon modules, some AWS modules, and SimpleDB::Client doesn't even have Amazon in the name.

Then there are the duplicate packages like Net::Amazon::DynamoDB and Amazon::DynamoDB, which are worlds apart. The former supports practically the original DynamoDB API, using signature version 2, and accepting numbers, strings, and sets of those types as data types. Not even binary types. Amazon::DynamoDB uses the version 4 signature and an updated data model, along with an async client built on IO::Async. Yes, seriously, in 2014 someone didn't use AnyEvent.

This wouldn't be so much of a problem if I didn't sail straight into RT#93107 while using it. The most insidious thing is that fds only get closed sometimes, so it mostly seems to work. Until it doesn't. But there's a patch... That's been open without comment for many months.

This is not unlike another patch, for AnyEvent::Connection, open even longer. I can understand if the maintainer thinks it's unimportant because it's "only a deprecation" or because an updated common::sense avoids the issue on affected Perl versions. But to not even comment? The package is apparently dead.

I recently ran into a little trouble finding any OAuth 2.0 server modules. I didn’t see anything general, nor anything for Dancer to be an OAuth server. We have plenty of clients and client-integrations to providers, though, and it didn’t take my boss long to find a PHP library that he wanted to use.

But enough about CPAN. Let’s talk Perl core.

Perl has been adding numerous ‘experimental’ features over the years. Since 5.16, the current status of all of these has been gathered in the perlexperiment documentation. Though 5.20.1 has now been released, there are items on that list introduced in 5.10.0.

An experimental feature that is neither accepted nor rejected is dead weight. Authors are discouraged from using them, so they’re not benefitting the majority of users, yet they require ongoing maintenance and care by the perl5-porters. An experimental feature that stays experimental for far, far longer than the deprecation cycle is the worst possible outcome.

Just imagine being excited about Perl and having conversations about, “Can it do «cool thing»?” or “Have they fixed «wart» yet?” and having to respond “Well, it’s experimental, so technically yes, but you shouldn’t use it.”

Eventually, that conversation is going to come down to “Why don’t you use «Ruby|JavaScript|PHP» instead? They have more cool stuff, and only one object system.”

Even if Perl made a major push to accept experimental features in “the next release,” there’s anywhere from months to years before that release is widely deployed as a baseline. Unless one wants to build their own Perl every week for their fresh cloud images, which is a whole other can of worms.

Meanwhile, the more unique stuff about Perl—regex syntax, contexts, sigils and their associated namespaces—aren’t exactly banner features anymore. Other languages have been absorbing regex syntax, and the rest of it tends to create bugs, even by authors who understand it all. That’s especially problematic when I change languages frequently, because the Perl-unique stuff takes longer to reload in my head than the rest of the language.

Overall, I’m thankful for what Perl has been for me. However, it seems like it has lost all its momentum, and it doesn’t have anything particularly unique to offer anymore. Certain parts of it like @_ and the choose-your-own-adventure object system feel particularly archaic, and I have to interact with them all the time.

Overall, it seems like basic stuff (IO::Poll working with SSL, please?) and easy fixes aren’t being taken care of, while new code isn’t showing up or isn’t high quality. If CPAN can’t keep up with the web, and the web is eating everything, then Perl will be eaten.

You are in a twisty little maze of event backends, all different.
Most of which can use most of the other backends as its own provider.

It pains me to write this. I don’t want to sound like a “BSD is dying” troll. I know I’m throwing a lot of criticism in the face of people who have put much more into Perl (and making Perl awesome) than I have. Miyagawa is perhaps singlehandedly responsible for why our API server started its life in Perl. But he can’t do everything, so the present signs are that no new Perl will be added to our codebase… because doing so would burden our future.

1 comment:

shevy said...

Come to Ruby. :)