{"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"//"}]}
    // the time we needed for codegenning it.
    // We assume that the cost to run GCC on a CGU is proportional to
    let cost = time_to_codegen.as_secs() * 1_000_000_000 + time_to_codegen.subsec_nanos() as u64;