In interest of providing extra information, my installation of Node 5.6.0
is using V8 version 4.6.85.31.

I’ve also committed the `node_modules` directory for my sample project and
replaced all the instances of `const` I could find via search with `var`:
https://github.com/hulbert/bookshelf-sample-v8/commits/modules-directory

Results are the same.

Best,
Scott Hulbert

On Mon, Feb 29, 2016 at 12:40 PM, Ben Noordhuis <[email protected]> wrote:

> On Mon, Feb 29, 2016 at 1:23 PM, Jakob Kummerow <[email protected]>
> wrote:
> > This is indeed surprising.
> > Crankshaft predates ES6, so this has nothing to do with ES6 const. That
> > said, I don't see why this function would bail out; and in a quick repro
> > attempt it doesn't. Do you have an example I can run that reproduces this
> > behavior?
> >
> > Also, is this actually a performance problem for you? Crankshaft aborts
> > compilation in some cases by design, often there's no need to worry about
> > it.
>
> If it helps, see [0] - we had to revert some changes to the url module
> because of this issue.  That's with V8 4.8.271.17.
>
> The benchmarks are in [1].  They normally run in a child process but
> you can run an individual benchmark directly with `./node
> benchmark/url/url-parse.js type=one n=25e4`.
>
> [0] https://github.com/nodejs/node/pull/5300
> [1] https://github.com/nodejs/node/blob/v5.7.0/benchmark/url/url-parse.js
>
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