Performance of frozen vs non-frozen objects

# Mark Miller (2 months ago)

At airbnb/javascript#1619 I wrote:

I tried jsperf.com/freeze-vs-seal-vs-normal/3 and

jsperf.com/freeze-vs-seal-vs-normal/28 on Chrome, FF, and Safari. I don't know why the bar charts are not updating. I am traveling and do not currently have access to a machine running Edge.

Could someone who has access to all four browsers, and knows how to get the displayed data to update, try these on all four? Thanks.

Please? The answer could prevent further damage being done by bad advice. Thanks.

# Boris Zbarsky (2 months ago)

On 12/26/17 9:07 AM, Mark Miller wrote:

I tried https://jsperf.com/freeze-vs-seal-vs-normal/3 and
https://jsperf.com/freeze-vs-seal-vs-normal/28 on Chrome, FF, and
Safari. I don't know why the bar charts are not updating. I am
traveling and do not currently have access to a machine running Edge.

Could someone who has access to all four browsers, and knows how to
get the displayed data to update, try these on all four? Thanks.

It's pretty hard to run both Edge and Safari on the same setup.

That said, at least jsperf.com/freeze-vs-seal-vs-normal/3 is being completely optimized away in Firefox for all of the testcases. Or at least running at the same speed as jsperf.com/freeze-vs-seal-vs-normal/30; for some reason jsperf

is refusing to create a revision that has both the control and the actual tests...

# Isiah Meadows (2 months ago)

Yeah...I've been having issues creating test cases, too. I feel one of us should probably report it. (I don't have the time ATM, and it's not something you can easily reproduce, so it might take a non-trivial amount of time.)

Isiah Meadows me at isiahmeadows.com

Looking for web consulting? Or a new website? Send me an email and we can get started. www.isiahmeadows.com

# J Decker (2 months ago)

On Wed, Dec 27, 2017 at 7:52 PM, Isiah Meadows <isiahmeadows at gmail.com>

wrote:

Yeah...I've been having issues creating test cases, too. I feel one of us should probably report it. (I don't have the time ATM, and it's not something you can easily reproduce, so it might take a non-trivial amount of time.)

couldn't figure out where to report it. Just gave up. Finally got the mod I wanted to see done though jsperf.com/freeze-vs-seal-vs-normal/36 using 'const' instead of var. Results in the same performances anyway.

I did notice that often sealed and frozen objects in V8 are either slower than or the same speed as unfrozen objects. (in near latest Node JS).