What does it mean that Kotlin based apps will get a performance boost on Android P

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP


What does it mean that Kotlin based apps will get a performance boost on Android P



Over the last few of months in a bunch of places I've seen the information that Android P will give the performance boost to Kotlin based apps (e.g. here and here).



On the official Android blog, Dave Burke in "Previewing Android P" post described it in a few words:



Kotlin is a first-class language on Android, and if you haven't tried it yet, you should! We've made an enduring commitment to Kotlin in Android and continue to expand support including optimizing the performance of Kotlin code. In P you'll see the first results of this work -- we've improved several compiler optimizations, especially those that target loops, to extract better performance. We're also continuing to work in partnership with JetBrains to optimize Kotlin's generated code. You can get all of the latest Kotlin performance improvements just by keeping Android Studio's Kotlin plugin up-to-date.



Does it mean that Kotlin can be optimised more than Java? Isn't true that kotlinc together with javac produces the Java bytecode (as Jake Wharton explains here). Or is it something what d8 dexer will take care off? But then won't it be applied to all Android versions? Has Dave meant that new tools for devs to optimise Kotlin code will be releases together with Android P?


kotlinc


javac


d8



Is it possible to differentiate java bytecode coming from Java and Kotlin In the first place? Or does it mean that ART will run java bytecode from Kotlin differently?


java bytecode


Java


Kotlin


java bytecode


Kotlin




1 Answer
1



The r8 tool is gaining the ability to detect specific bytecode patterns produced by the Kotlin compiler and to translate them into more efficient Dalvik bytecode. This doesn't mean that Kotlin can be optimized more than Java, only that Kotlin produces bytecode with a somewhat different structure.


r8



The new r8 tool can also be used to compile apps targeting earlier Android versions, with the same performance gains.



This podcast gives some additional background on r8 and its optimizations: http://androidbackstage.blogspot.com/2018/01/episode-86-its-gr8.html






By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

-

Popular posts from this blog

Makefile test if variable is not empty

Makefile test if variable is not empty In a makefile I'm trying to I've created this simplified makefile to demonstrate my problem. Neither make a or make b executes the body of the if, I don't understand why not. make a make b .PHONY: a b a: $(eval MY_VAR = $(shell echo whatever)) @echo MY_VAR is $(MY_VAR) $(info $(MY_VAR)) ifneq ($(strip $(MY_VAR)),) @echo "should be executed" endif @echo done b: $(eval MY_VAR = $(shell echo '')) @echo MY_VAR is $(MY_VAR) $(info $(MY_VAR)) ifneq ($(strip $(MY_VAR)),) @echo "should not be executed" endif @echo done I'm using $ make --version GNU Make 3.81 There are several problems, and misunderstandings. Your MY_VAR is a make variable, set it without a <tab> to its value, and no need to $(eval ...) . MY_VAR:=$(shell echo whatever) is enough. No <tab> before $(info ...) neither, this is make – Zelnes ...
Read more

Will Oldham

Image
"Palace Music" redirects here. For the racehorse, see Palace Music (horse). Bonnie 'Prince' Billy Will Oldham, June 6, 2009 Background information Birth name William Oldham Also known as Palace Brothers Palace Music Bonnie 'Prince' Billy Born ( 1970-12-24 ) December 24, 1970 (age 47) Louisville, Kentucky, United States Genres Folk alternative country country freak folk [1] Years active 1993–present Labels Drag City, Domino, Spunk Associated acts Dawn McCarthy, The Cairo Gang, Mekons, Matt Sweeney, Mick Turner, Tortoise, Trembling Bells, Harem Scarem, The Picket Line, Alex Neilson, Björk, Slint Website www.bonnieprincebilly.com Will Oldham (born December 24, 1970), better known by the stage name Bonnie 'Prince' Billy , is an American singer-songwriter and actor. From 1993 to 1997, he performed and recorded under variations of the Palace name, including the Palace Brothers, Palace Songs, and Palace Music. After releasing material under his own name,...
Read more

'Series' object is not callable Error / Statsmodels illegal variable name

Image
Clash Royale CLAN TAG #URR8PPP 'Series' object is not callable Error / Statsmodels illegal variable name Update: You can download my dataset here. I am running a simple OLS regression with statsmodels and pandas dataframe as following: import statsmodels.formula.api as sm import pandas as pd df=pd.read_csv("exp.csv") #df is a dataframe that I have containing many variable names such as AAPL, SPY, INF, etc. for column in df: result=sm.ols(formula="SPY"+" ~ "+column, data=df).fit() However, one of the column name in df is INF . I guess maybe INF is a reserved word for pasty, the code gives me the following error: INF INF Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/ap248/.local/easybuild/software/2017/Core/miniconda2/4.3.27/lib/python2.7/site-packages/statsmodels/base/model.py", line 155, in from_formula missing=missing) File "/home/ap248/.local/easybuild/softw...
Read more