I don't agree that 2 million lines of code is "going to take a few minutes to compile no matter what [compiled] language it's written in." Based on my experiences with Go so far, I believe Go could get that significantly faster, probably under a minute. Also, the "several minutes" number I quoted is also for incremental compiles where only one very small thing has changed, not just for full compiles, which take even longer.
TIOBE is a poor measure of programming language popularity for a lot of reasons. But even if we accept that Java, C, C++, and C# are the top languages, I already commented that Java's build is not that fast in the real world (except for very small projects). I don't have any first-hand experience with C#, but I've never heard anyone claim fast compilation is an advantage of that language. C and C++ are slow builders, as we already know. So the top compiled languages are rather slow compilers, which is one reason why scripting languages (I assume you mean non-ahead-of-time-compiled-languages) became popular in the 2000s. This is one part of what Rob Pike was talking about when he said "poorly designed static type systems drive people to dynamic typing."
I would be skeptical of that, but I wasn't able to find LOC/sec stats for the Go compiler(s) anywhere. If you can point me to LOC/sec performance figures, that'd be interesting.
Gradle/Maven don't do incremental compilation at the level of the file, so yes, they're gonna redo the whole thing each time. Use an IDE for that. IntelliJ will happily do incremental compilation in Java projects at the level of the individual file (and there's no relinking overhead).
I understand that you're saying the top languages are slow builders, but it's just not the case. It sounds like you've used tools which simply aren't optimised for build times and judging the language based on that. But I usually have roundtrip times between editing my code and running the recompiled program of about a second when working with Java.
I have used both Eclipse and Intellij for building Hadoop, and neither could get incremental compilation under 30 seconds. In fact, it was often much more than that. Eclipse was a huge pain to use with Hadoop because it was always getting something wrong-- many times when you updated the project dependencies, Eclipse would essentially break and need manual fixing. Even loading up the project in either IDE takes at least a solid minute, with an SSD, Intel i7, and 16 GB of RAM.
Prior to using Java, I used C++ for 10 years. Every project I worked on had compile time problems. It was an open secret that we spent most of our time waiting for compiles.
It's very common for people working on small projects to feel good about their compile times. But sometimes projects grow up, and they outgrow the language and the tools they were designed in.
> TIOBE is a poor measure of programming language popularity for a lot of reasons.
And yet, it is completely consistent with pretty much all other measurements of programming language popularity (github, job postings, StackOverflow answers, etc...).
According to TIOBE, Groovy rose from 0.33% to 1.8% in the last two months, and from 0.11% to 1.8% in the last 12 months. Click on "Groovy" from the main page and you'll get the graph at http://www.tiobe.com/tiobe_index?page=Groovy . Now say "maybe TIOBE's not that poor a measure of programming language popularity" with a straight face. These stats are gamed by language backers to make their language look good when selling consulting services and tickets to conferences, convincing programmers to contribute free work to their product, etc.
TIOBE is a poor measure of programming language popularity for a lot of reasons. But even if we accept that Java, C, C++, and C# are the top languages, I already commented that Java's build is not that fast in the real world (except for very small projects). I don't have any first-hand experience with C#, but I've never heard anyone claim fast compilation is an advantage of that language. C and C++ are slow builders, as we already know. So the top compiled languages are rather slow compilers, which is one reason why scripting languages (I assume you mean non-ahead-of-time-compiled-languages) became popular in the 2000s. This is one part of what Rob Pike was talking about when he said "poorly designed static type systems drive people to dynamic typing."