If someone gets to the bottom of this, can you post an update on this 
thread with the results, not just to the bug report?  

Thank you.

--Zac

On Thursday, July 19, 2018 at 3:18:58 PM UTC-7, jzw wrote:
>
> Hi Jakob,
> Could you point me to the file in src that's corresponding to 
> context::new()?
>
> On Tuesday, July 17, 2018 at 2:36:29 PM UTC-7, jzw wrote:
>>
>> Thanks!
>> Bug filed at https://bugs.chromium.org/p/v8/issues/detail?id=7951
>>
>> On Tuesday, July 17, 2018 at 12:12:37 AM UTC-7, Jakob Gruber wrote:
>>>
>>> Interesting, I'm not aware of anything specific that slows down 
>>> Context::New. Could you perhaps narrow down the regression further & file a 
>>> bug? The build flags below look fine to me.
>>>
>>> On Tue, Jul 17, 2018 at 1:14 AM, jzw <wanzhic...@gmail.com> wrote:
>>>
>>>> I narrowed down to context creation time. 
>>>> when I measure the time around v8::Context::New(), I noticed 30%-40% 
>>>> increase with the newer version. This is with snapshot enabled. I am 
>>>> wondering if I could further reduce the time for context creation or have 
>>>> to accept it?
>>>> Thank you!
>>>>
>>>>
>>>> On Friday, July 13, 2018 at 5:47:53 PM UTC-7, jzw wrote:
>>>>>
>>>>> Hello, 
>>>>> We recently upgraded v8 from 5.3 to 6.7. And when doing a profiling 
>>>>> test after embedding, I found the speed with the new build is slower than 
>>>>> the old one(quite significant). I know there is fair chance that our old 
>>>>> way of embedding v8 causes inefficiency. Apart from that, may I get some 
>>>>> suggestions to make the build faster (for release at least).
>>>>>
>>>>> Currently I compiled v8 with the following options
>>>>> is_debug = false
>>>>> is_official_build = true
>>>>> is_component_build = true
>>>>> is_cfi = false
>>>>> is_clang = false
>>>>> use_custom_libcxx = false
>>>>> use_sysroot = false
>>>>>
>>>>> is the build with the above options already most optimized one? Any 
>>>>> more options I could use?
>>>>>
>>>>

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