You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: profiling.rs
    path of file: ./repos/deno/bench_util
    
    the code of the file until where you have to start completion: // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use bencher::DynBenchFn;
use bencher::StaticBenchFn;
use bencher::TestDescAndFn;
use bencher::TestOpts;

pub fn is_profiling() -> bool {
  std::env::var("PROFILING").is_ok()
}

#[macro_export]
// Tweaked and copied from https://github.com/bluss/b
    
    fn main() {
      use $crate::bencher::TestOpts;
      use $crate::bencher::run_tests_console;
      let mut test_opts = TestOpts::default();
      // check to see if we should filter:
      if let Some(arg) = ::std::env::args().skip(1).find(|arg| *arg != "--bench") {
          test_opts.filter = Some(arg);
      }
      let mut benches = Vec::new();
      $(
          benches.extend($group_name());
      )+

      if $crate::is_profiling() {
        // Run profiling
        $crate::run_profiles(&test_opts, benches);
      } else {
        // Run benches
        run_tests_console(&test_opts, benches).unwrap();
      }
    }