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Without any modifications, React is really fast as-is. There are, however, a few things that you can do to improve performance. While working at HelloSign, I discovered some quick fixes that made our apps incredibly snappy. With these simple changes, I was able to reduce render time from over 3000 milliseconds to less than 200 milliseconds.

Without any modifications, React is really fast as-is. There are, however, a few things that you can do to improve performance. While working at HelloSign, I discovered some quick fixes that made our apps incredibly snappy. With these simple changes, I was able to reduce render time from over 3000 milliseconds to less than 200 milliseconds.

Editor’s Note:

Check out our upcoming React University Workshops. Our next workshop, React 2016, will be held on April 23 at Microsoft Reactor in San Francisco and will offer a deep dive into creating modern Single-Page Applications (SPA) using React, Redux, React Router, Immutable.js, and Webpack. Also, if you’re interested in learning the basics about what it takes to be a Data Visualization Engineer, check out React and D3.

Introduction

HelloSign is a cloud-based electronic signature tool founded in 2010. As you can imagine, HelloSign is a very JavaScript-heavy codebase. A lot of client-side behavior is necessary to create a rich signing experience. Lately, we’ve moved much of our codebase toward React. In fact, in many places we’ve broken up our codebase into several single-page applications written in React.

Although the HelloSign team was happy with React’s performance before I initially joined the project, I quickly found some low-hanging fruit that could improve runtime speed. Here are the steps you should take to see similar improvements in your own applications.

Create a Baseline Performance Measurement

Before you begin, you should take a baseline measurement. Optimizations are meaningless if you can’t verify the results of your modifications.

Thankfully, Chrome has excellent developer tools to help. One, little-used feature of Chrome’s DevTools is the “Timeline” tool. It allows you to record and analyze all activity in your application. You can record interactions on the page, locate potential memory leaks, measure the total time it takes to perform a task, and identify areas of potential jank. Best of all, the results can be recorded for comparison with your final benchmark.

There’s actually a really awesome video on Chrome’s DevTools that goes into detail about the “Timeline” feature. You can view it here.

We chose to measure the time elapsed between the initial paint of our signer page to the final rendering of the entire page. The initial download of our bundles still needs some optimization, but we’re neither going to mess with nor measure this parameter. It’s fairly easy and consistent to test render time rather than trying to click areas around the page and trying to measure its performance in a repeatable way. Then, all we needed to do was to go to the signer page, open Chrome’s DevTools “Timeline” tab, and refresh the page.

As a side note, make sure that when performing this test, the “Paint” and “Screenshots” boxes are checked so that you can see what the user sees as the page is being rendered.

After all that, we determined that our rendering time from initial paint was a little over 3 seconds. Much too long. Luckily, there was little we had to do to make this quite a bit faster.

Set NODE_ENV to Production

This step is easy to get wrong, even if you are well-informed. React’s documentation provides an overview, but doesn’t provide many specifics. React has great developer warnings and error checking, but these are only intended for development; if you take a look at React’s source code, you’ll see a lot of if (process.env.NODE_ENV != 'production') checks. This is running extra code that is not needed by the end user, not to mention that calling process.env.NODE_ENV is extremely slow. For production environments, we can remove all this unnecessary code. Just keep in mind that you don’t want to do this in development because it will remove all those helpful developer warnings.

If you’re using Webpack, you can use DefinePlugin to replace all instances of process.env.NODE_ENV with 'production', and then use the UglifyJsPlugin to remove all the dead code that no longer runs. Here’s a sample setup that you might use:

// webpack.config.js
  ...
  plugins: [
    new webpack.DefinePlugin({
      // A common mistake is not stringifying the "production" string.
      'process.env.NODE_ENV': JSON.stringify('production')
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      }
    })
  ]
  ...

React Constant and Inline Elements Transforms

React 0.14 introduced support for certain transpile time optimizations with Constant and Inline Element Babel Transforms. React Constant Elements treats JSX elements as values and hoists them to a higher scope. In other words, it hoists static elements and thereby reduces calls to React.createClass. React Inline Elements converts JSX elements into the object literals that they eventually return. Again, this minimizes the runtime calls to React.createClass.

The implementation is rather simple. We added our Babel configuration in our package.json file:

// package.json
  ...
  "babel": {
    "env": {
      "production": {
        "plugins": [
          "transform-react-constant-elements",
          "transform-react-inline-elements"
        ]
      }
    }
  },
  ...

Final Measurement / Conclusion

Lastly, you’ll want to run the benchmark again and compare it with that saved benchmark from before these optimizations. As you can see, the total runtime profile ends 200ms after initial paint! That’s 15 times faster!

Argentina defeated Russia 5-4 in a dramatic FIFA Futsal World Cup Colombia 2016 final at the Coliseo el Pueblo in Cali to win the country's first-ever Futsal World Cup title.

De Arrascaeta and Flamengo show their resilience

Jos Buttler has revealed that his wife had mistaken AB de Villiers to be a New Zealander when they first had a conversation during the Indian Premier League (IPL), the England wicketkeeper batsman has said.

"De Villiers has been my idol growing up. The guy I love watching, he is just awesome," Buttler, who plays for Rajasthan Royals in the IPL, said during The Royals Podcast Episode 3, the full show of which will be aired on their official social media handles on Tuesday.

"Got to know him little bit during the IPL actually when I was at Mumbai (Indians). Just at the start of the game, he said I will catch up with you for a beer at the hotel after the game," said Buttler, a World Cup winner in 2019 with England and also regarded as one of the most destructive batters of the game today.

"I was like so excited. I was like so cool getting to drink a beer with AB de Villiers. I got back to the hotel told Louise (my fiance at that time, now wife) we are going to go straight to the bar. "AB de Villiers will be there for a drink, this is going to be awesome.

"We then we probably chatted for 20 minutes, having a great time I am loving it and he has got pretty strong Afrikaans accent. About 20 minutes into the conversation, Louise asks 'which part of New Zealand are you from'? and that just absolutely killed me," said the 29-year old, laughing. Buttler was born in Taunton, Somerset and has so far played 41 Tests, 142 ODIs and 69 T20Is for England.

Prior to this, Royals spin bowling consultant and New Zealand leg-spinner Ish Sodhi, who is generally the host of the show, spoke to Australian batting ace Steve Smith and Shreyas Gopal.

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In the latest episode of ESPNcricinfo's Videocast, host Sanjay Manjarekar chats up with Michael Hussey, former international Australian Cricketer and one of the finest finishers cricket has ever produced about his career, his art of finishing, Mahendra Singh Dhoni and more.

A reliable finisher, Hussey usually came to bat at a time when his team either needed to accelerate the run rate rapidly or manage an early crisis. Talking about his mantra on how he handled such enormous pressure, Hussey says, "You can either succumb to it, lose your focus, or narrow your focus. I saw pressure as an opportunity to do something special. To take the pressure off, I would think of how it will feel to win at the end of the game, celebrate and be able to get a goodnight's sleep. And that's what got me going."

Hussey played at a time when Australia boasted of one of the most robust middle order, and he gives credit to his teammates as well, "The guy at the other end needs to help too. I was lucky to have a middle-order that helped me with the chase. I loved batting with Ricky Ponting, Andrew Symonds, Michael Clarke and others. They're all fantastic players in their own right and did lend a helping hand in tricky situations". "I was lucky to have a set, rigid pre-ball routine for every single delivery that I faced, which helped me switch on and off in between deliveries," Hussey adds further.

To understand Hussey's approach better, Sanjay Manjarekar uses one of Javed Miandad's theory, "If Javed needed 11 or 12 runs an over, he would try to get at least 8 runs an over because there will invariably be wide or no-balls to compensate for the remaining runs", and asks Hussey if he followed the same mantra. "I tried not to let it reach 12 or 13 runs an over. And I learnt this from MS Dhoni. He is incredible. He believes that he who panics last wins the game. So Dhoni would keep his cool, and keep it longer because the pressure is on the bowler as well. So, Javed rightly says, chances of a wide or a no-ball are higher. And if you can keep your cool longer than the opposition, you can come out on top", responds Hussey.

Hussey believes that the greatest players of the game have a few common traits like, 'They don't hang on to a defeat for too long. If they lose, they move on quickly. They don't let a loss or a win hamper their thinking. They are always consistent, and level headed whether it's MS Dhoni or Ricky Ponting".

Talking about Dhoni’s finishing ability, Sanjay recalls one of India’s game against Sri Lanka in West Indies. Dhoni was on strike, India needed 17 runs in the last two overs and Sri Lanka put their best bowler to bowl the penultimate over. “Dhoni just got 3 runs in that over leaving 14 to get from the last over which was to be bowled by a weaker bowler. That’s seemingly impossible, but then how does Dhoni manage to do this”, asks Sanjay. Hussey, who is full of praises for former Indian captain, claims, "Dhoni is the greatest finisher of all time that the cricketing world has ever produced." He adds, "Dhoni can keep his cool and make the opposition captain blink first. Dhoni also has unbelievable power. He knows that when he needs to clear the ropes he can do it. He has that kind of self-belief. Honestly, I didn't have that kind of belief in myself."

Chennai Super Kings (CSK) is Sanjay's favorite IPL team, and he wants to know what makes them so consistent. Hussey lets out the secret, "Supportive owners who let the Coach Flemming and Captain Dhoni decide how to run the team, excellent chemistry between the coach and the captain, Dhoni’s leadership and lastly the foresight of the owners, Flemming and Dhoni to pick the best players, particularly the good Indian players and then stick with them for as long as possible." This has built an excellent continuity in the team. And once you have continuity, you build relationships and trust that otherwise takes time to grow."

Responding to Sanjay's question on CSK's future after Dhoni moves on, Hussey says, "That's a 60 million dollar question, and I am equally intrigued. I believe the owners would like to keep Dhoni involved in some way or the other. However, whenever the change of guard happens, CSK might want to start all over again, build a brand new team, and use their existing philosophy as they enter the next decade of IPL. It is definitely going to be more challenging in current times."

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Sri Lanka has offered to host the 13th edition of the Indian Premier League (IPL) which has now been indefinitely suspended by the BCCI due to the ongoing coronavirus pandemic.

The 2020 IPL edition was slated to start from March 29 but with the coronavirus outbreak it was first deferred till April 15 and now with the extension of nation-wide lockdown in India till May 3, it has been indefinitely suspended.

Apparently, the Sri Lanka cricket board has written to their Indian counterparts wherein they have offered to host the IPL.

"Apparently it will cost the BCCI and its stakeholders more than $500 million to cancel the IPL," ESPNcricinfo quoted Shammi Silva, SLC president, as telling to Sinhala daily Lankadeepa.

"So perhaps they can minimise those losses by hosting the tournament in another country.

"If they play it in Sri Lanka, it's easy for Indian audiences to watch the games on TV. There's precedent for this because they've played the IPL in South Africa before. We're waiting for the Indian board to respond to our proposal," he added.

On two occasions in the past, the IPL has been shifted out of India. The 2009 edition of the IPL had been moved to South Africa due to Lok Sabha elections. In 2014, the UAE had hosted the first two weeks of IPL also because of the general assembly polls in India.

"If the Indian board does agree to play the tournament here, we're ready to provide facilities in line with the requirements and recommendations of medical professionals. It would be a substantial source of income for Sri Lankan cricket as well," Silva said.

Sri Lanka has so far registered fewer number of coronavirus cases as compared to India. Till now, the country has over 230 COVID-19 cases while seven lives have been lost in the island nation.

However, the lockdown imposed in Sri Lanka is even more severe than that in most parts of India, with a curfew having been put in place for almost four weeks. The Sri Lanka government remains optimistic about eliminating the virus from the country and if the goal is achieved, then Sri Lanka can become a viable option as an IPL venue. However, even then, the government clearance would be required to host such a big tournament.

In India, the condition is worse as more than 13,000 confirmed cases have been reported thus far with more than 400 people losing their lives to coronavirus.

BCCI is also looking at the two options of having an IPL this year. They are looking to organise the event in September and early October before the T20 World Cup in Australia or hosting it at the expense of the T20 World Cup if the ICC, Cricket Australia and other stakeholders are all in agreement.

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On the 13th anniversary of the VIVO IPL, Mumbai Indians’ lethal strike weapon Lasith Malinga was declared the Greatest of All Time (G.O.A.T) among bowlers in the storied history of the tournament by an esteemed jury by Star Sports on their flagship show Cricket Connected. The Sri Lankan veteran, part of an elite 10-bowler nominee list, pipped the likes of Dale Steyn, Ashish Nehra, Sunil Narine and Jasprit Bumrah for the award.

The highest wicket-taker in the tournament with 170 wickets in 122 matches, ‘Slinga Malinga’ has been one of those legends who changed the perception of T20 cricket and became one of the early heroes in a batsman-dominated format. Despite overcoming a string of fitness issues, Malinga has been able to deliver pinpoint toe-crushers coupled with skillful variations over the last 12 years of the VIVO IPL that made him one of the most threatening bowlers to face at any stage of the game, and the unanimous choice for the GOAT bowler. In fact, it was Malinga’s last over that gave Mumbai Indians their fourth title with a one-run, last-ball win in 2019.

Former England captain and Star Sports expert Kevin Pietersen, part of the jury, backed his decision to choose Malinga for the coveted award said on Cricket Connected, “I’m going with Lasith. You look at the numbers he has served up and the way he has consistently used that yorker, that makes everyone talk about it. Malinga is my guy. I would go with Narine, but he has bowled on wickets which helped turn. Also, he has been questioned on a few occasions for this suspect bowling action, so I am afraid to say that I am going with Malinga,”.

In addition, Malinga, the first Sri Lankan to claim four wickets in four deliveries, went past Bhuvneshwar Kumar, Ashish Nehra, Ravichandran Ashwin, Amit Mishra, Imran Tahir and Yuzvendra Chahal, who were also part of the nominee list.

Besides winning Pietersen’s vote, Malinga also found favour among Star Sports experts Dean Jones, Mathew Hayden, Aakash Chopra, Graeme Smith, Simon Doull, Ian Bishop and Tom Moody, who all voted for the Sri Lankan as their first choice for GOAT – bowler.

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