It's a one-time cost, but we're also not done improving Closure Compiler's ability to minify core. There's a lot of Closure Compiler-specific metadata we're no

It's a one-time cost, but we're also not done improving Closure Compiler's ability to minify core. There's a lot of Closure Compiler-specific metadata we're not leveraging yet, and our goal is to reduce the baseline to much, much less.