Michael Tsai on Twitter: "@jckarter @mpweiher @phink0 @wilshipley I’ve only been timing different Swift versions vs. Marco’s original. Didn’t test Obj-C."

Country	Code	For customers of
United States	40404	(any)
Canada	21212	(any)
United Kingdom	86444	Vodafone, Orange, 3, O2
Brazil	40404	Nextel, TIM
Haiti	40404	Digicel, Voila
Ireland	51210	Vodafone, O2
India	53000	Bharti Airtel, Videocon, Reliance
Indonesia	89887	AXIS, 3, Telkomsel, Indosat, XL Axiata
Italy	4880804	Wind
3424486444	Vodafone
» See SMS short codes for other countries

Marcel Weiher ‏@mpweiher May 29

@phink0 @wilshipley That looks about smack in the middle of the relative slowdowns I have been seeing.
1 like
Michael Tsai ‏@mjtsai May 29

@mpweiher @phink0 @wilshipley That’s very interesting. Have you tried profiling it? Bridging overhead?
Marco Scheurer ‏@phink0 May 29

@mjtsai @mpweiher @wilshipley Here's the profile (and for completeness the ObjC simple/naive/ugly filter category)pic.twitter.com/lbeIS8sEg8
1 like
Michael Tsai ‏@mjtsai May 29

@phink0 @mpweiher @wilshipley The Foundation -hasPrefix: does an exact compare; maybe Swift stdlib one does a fancy Unicode compare.
Joe Groff ‏@jckarter May 29

@mjtsai @phink0 @mpweiher @wilshipley Yeah. Some Unicode operations are also implemented naively and make unnecessary extra copies.
2 likes
Marcel Weiher ‏@mpweiher May 29

@jckarter @mjtsai @phink0 @wilshipley Dunno, I see “CFStringFindWithOptionsAndLocale()” in the profile and also when I profile -hasPrefix:
Joe Groff ‏@jckarter May 29

@mpweiher @mjtsai @phink0 @wilshipley By "naive" I mean "copy into a CF string and hand off to a CF fn". Super naive
Marcel Weiher ‏@mpweiher May 29

@jckarter @mjtsai @phink0 @wilshipley I was replying more to the “fancy unicode vs. exact”, AFAICT they do the same.
Joe Groff ‏@jckarter May 29

@mpweiher @mjtsai @phink0 @wilshipley The same CF takes a bunch of flags to enable different behaviors.
1 like
Joe Groff ‏@jckarter May 29

@mpweiher @phink0 @wilshipley Regardless, even with naive comparison it looks like @mjtsai still sees a >3x diff.
1 like

Loading seems to be taking a while.

Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

Michael TsaiVerified account

@mjtsai

Loading seems to be taking a while.

false

Saved searches

Michael TsaiVerified account

@mjtsai

Go to a person's profile

Saved searches

Retweet this to your followers?

Saved searches

Are you sure you want to delete this Tweet?

Promote this Tweet

Block

Add a location to your Tweets

Profile summary

Your lists

Create a new list

Copy link to Tweet

Embed this Tweet

Embed this Video

Preview

Log in to Twitter

Sign up for Twitter

Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

Two-way (sending and receiving) short codes:

Confirmation

Buy Now

Hmm... Something went wrong. Please try again.

Welcome home!

Tweets not working for you?

Say a lot with a little

Spread the word

Join the conversation

Learn the latest

Get more of what you love

Find what's happening

Never miss a Moment

Loading seems to be taking a while.

Promoted Tweet

false