In this post we’ll look at five ways in roomates efficient coding we can use to help our garbage collector CPU spend less time allocating and freeing memory, and reduce GC overhead. Often Long GCs can lead to our code being stopped while memory is reclaimed (AKA “stop the world”). Duke_GCPost

Some background

The GC is built to handle large amounts of allocations of short-lived objects (think of something like rendering a web page, where most of the objects allocated Become obsolete once the page is served).

The GC does this using what’s called a “young generation” – a heap segment where new objects are allocated. Each object has an “age” (placed in the object’s header bits) defines how many roomates collections it has “survived” without being reclaimed. Once a certain age is reached, the object is copied into another section in the heap called a “survivor” or “old” generation.

The process, while efficient, still comes at a cost. Being Able to reduce the number of temporary allocations can really help us increase of throughput, especially in high-scale applications.

Below are five ways everyday we can write code that is more memory efficient, without having to spend a lot of time on it, or reducing code readability.

1. Avoid implicit Strings

Strings are an integral part of almost every structure of data we manage. Being much heavier than other primitive values, they have a much stronger impact on memory usage.

One of the most important things to note is that Strings are immutable. They can not be modified after allocation. Operators such as “+” for concatenation actually allocate a new String containing the contents of the strings being joined. What’s worse, is there’s an implicit StringBuilder object that is allocated to actually do the work of combining them.

For example –

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a = a + b; / / a and b are Strings
The compiler generates code comparable behind the scenes:

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StringBuilder temp = new StringBuilder (a).
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temp.append (b);
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a = temp.toString () / / a new string is allocated here.
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/ / The previous “a” is now garbage.
But it gets worse.

Let’s look at this example –

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String result = foo () + arg;
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result + = boo ();
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System.out.println (“result =” + result);
In this example we have 3 StringBuilders allocated in the background – one for each plus operation, and two additional Strings – one to hold the result of the second assignment and another to hold the string passed into the print method. That’s 5 additional objects in what would otherwise Appear to be a pretty trivial statement.

Think about what happens in real-world scenarios such as generating code a web page, working with XML or reading text from a file. Within a nested loop structures, you could be looking at Hundreds or Thousands of objects that are implicitly allocated. While the VM has Mechanisms to deal with this, it comes at a cost – one paid by your users.

The solution: One way of reducing this is being proactive with StringBuilder allocations. The example below Achieves the same result as the code above while allocating only one StringBuilder and one string to hold the final result, instead of the original five objects.

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StringBuilder value = new StringBuilder (“result =”);
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value.append (foo ()). append (arg). append (boo ());
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System.out.println (value);

Unggulkan Big Screen

The success of one of the Korean manufacturer to sell millions of smartphone unit have made a great sailing inspired many other manufacturers. However, to be sold at more competitive prices, various gadgets “rival” comes with fewer features. This is carried by Vandroid S5 from Advan.

u4-435-S5 AdvanAdvan Vandroid by PCplus quite on par with ZA987 OneScribe of Zyrex that appeared almost simultaneously. ˝ 5.3 capacitive screen with a resolution of 480 × 800 pixels here look quite a contrast and not inferior to similar products from leading brands. Advan S5 Vandroid called as “Smart Note” which is interpreted as a smart gadget with a variety of features that support mobile activities. This seems to be a campaign to educate consumers.

Smartphone MediaTek MT6575 is powered by a 1GHz processor (ARM v7) plus 512MB of main memory is actually not very special and still like most other large screen smartphones. Booting the system fairly quickly became hallmarks Vandroid Advan S5.

Here also 4GB of internal memory available. Unfortunately, only 2.2 GB of available capacity that can be used. It was only by the system / application alias can not be accessed directly by the user. As a result, users must add a microSD card (up to 32GB) as a storage media to store data.

The process of exploration in the menu Vandroid Advan S5 with Android 4 systems is quite smooth because of the PowerVR SGX531 GPU to handle graphics side. Advan smartphone also includes six important sensor that is not provided other competitors. With all those fittings plus dual SIM support, he can be had for less than Rp. 2 million. This makes it an attractive alternative products in the ranks of the many large screen smartphones on the market today.

Maybe not as perfect Advan S5 Vandroid similar smartphones from popular brands. When held casing feels slippery. However, to simply live day-to-day activities of this product is sufficient. At more competitive prices, even compared to other local brands, this smartphone is certainly attractive alternative option for on a budget.

Website analytics company StatCounter have revealed its latest report covering global trends of internet access and software popularity. Dubbed ‘Internet Wars’ the report contains two major power shifts: in terms of mobile internet access Samsung has overtaken Apple whilst Chrome have has stolen Internet Explorer’s browser crown. See below for a full break-down of the report:

Mobile: Samsung & Chrome lead the way

In terms of mobile vendors the changes have been somewhat expected. 12 months ago Nokia was the number one vendor for connecting to mobile internet but they’ve now dropped to third place as Samsung overtakes Apple by a small margin.

In terms of mobile browser usage the global market shows Android’s default browser out in front with 29% compared to Safari’s 25%; but in the US and the UK the Apple products are clear leaders – taking 55% and 48% of the market share respectively.

This is a direct reflection of mobile OS trends where Android are ahead globally (38%, up from 26% last year) but with the US and the UK showing a pretty clear preference for the iOS. In the US Apple takes 55% and Android 39%; in the UK Apple gets 48% and Android has 30%. The UK also proves to be a bit of a hold-out for Blackberry – holding on to a respectable 15% of the market.

Browsers & Operating Systems: Internet Explorer beaten, but Windows remains dominant

The browser wars have seen Google overtake Microsoft’s Internet Explorer for the first time in June this year, with Firefox and Safari taking third and fourth place respectively. Chrome took 34% of the market, compared to IE’s 32%.

StatCounter’s report also took in the balance of power with operating systems, showing Windows 7 actually increasing its internet usage share to 51% despite the fanfare-launch of Windows 8. And 12 years after its launch, Windows XP is still hanging in there with 21% of the global market, comfortably above Apple’s consistent third-place OSX (over 7% share).

In the UK specifically Windows 7 still keeps its top-spot with a 49% market share, but – unlike in the global market – Mac’s OSX takes second place with 11%, beating out Windows XP’s 10% share.

It was also revealed that despite reports of Facebook’s declining appeal amongst teenagers the site has still managed to increase its market share – at least in terms of referall traffic, the metric that StatCounter uses.

Social media: Facebook still king, though UK has a soft spot for Twitter

Worlwide Facebook has increased its referral influence from 61% in June 2012 to 71% in June 2013. Other social networks still barely register on this scale – with StumbleUpon falling from 9% to 5%, Pinterest taking the number two slot with 8% and Twitter taking up third place with 7%.

In the US Pinterest had a far more dominant position, climbing to a healthy second place in terms of referral traffic with 22% of the market share compared to Facebook’s 52%; whilst in the UK it was Twitter that took the number two spot, with 16% of referral traffic compared to Facebook’s 62%.

However, it should be noted that referral traffic – whilst a useful metric – is by no means the be all and end all of social media influence.

A recent essay by Ethan Zuckerman for the Atlantic pointed out that whilst Facebook may dominate in terms of

Jakarta – Toshiba Singapore Digital Products & Service Group (DS) has launched a new range of accessories to complement the latest Toshiba laptop PC in Jakarta, July 4, 2013. Among the accessory circuit is Canvio ® Slim II and Hard Disk Canvio ® Connect. Software comes with NTI ® Backup Now EZ ™, this product provides safety back-up data for users to restore the original data in a computer crash while. Both the hard disk comes with Pogoplug ® PC so as to facilitate the process of backing-up data video and photos directly to the hard disk of smart phones, tablets, and other devices. As a bonus, Canvio ® Slim II has a data storage capacity of free cloud 10GB1 are always ready to keep a copy of important data users. Toshiba launches Camileo X150 camcorder is equipped Full HD resolution (1920x1080p), 10x optical zoom, and video stabilization for high-quality recording. This product has a mini-HDMI and mini-USB 2.0 for easy data exchange and content to an HD TV or other PC.Produk is Toshiba Mobile Display 15.6 “USB-based power. Additional display screen with LED panel features for image clearer and clearer on any laptop running Windows ®.

In the present modern-day world of business, it would appear that there exists a sense by which issues are predicated on meanings along with information. This is due to there are usually such huge amounts of collected data that they are today termed as “big data,” and because this specific sort of data created by means of numerous companies which are related, yet diverse. Which in turn maybe is how it came about that these days within computer and enterprise speak, an enterprise is an agency which utilizes pc systems and that, generally, yields plenty of info. These kinds of establishments encompass a variety of sorts, from colleges to healthcare organizations to nations to big commercial establishments. Countless small enterprises, also, turn out to be an enterprise. The sole thing these kinds of issues share is a need to always be allowed to obtain and even manipulate the information they’ve saved in a significant and also efficient method.

In almost any dialogue of real information and also its handling, it must be recognized that Google has spoiled everyone by offering this type of exceptional design in its elite search engine. Simply because people could uncover nearly anything they want online via Google, they at this point wish to have the ability to perform the very same with their closed company system. This type of enterprise search may be possible, with the right enterprise search instrument. There are a selection of models available on the market, some in the process of being retired, others which are open source, cost-free, and also which can be additionally offered by means of a variety of firms as a controlled option, and even still others that exist for a cost, and which can be personalized to virtually any business’s distinct needs.

Frequently, it will be the institution itself that can determine which of the actual attainable versions might suit it most effectively. For example, watson search features a excellent track record in many medical care career fields and creates bankable info that is trusted by as much as 90% of nurses with admittance to it. The way folks key in their own search queries has altered overtime with the Internet, as well as that habit to chat conversationally to Google, as though the search engine were a trustworthy pal has necessitated that various enterprise search designs look much more intently upon responses related to text analytics and even semantic search words.

There is a great deal of information. It truly is not going away soon, and there is a lot more coming along behind it. It’s simply being produced all over the place, by everyone, plus there is so much of it that just saving it is a essential matter. We have to have the ability to use this kind of info in a meaningful way, for with out that capability, you don’t have to gather it. Luckily, all of us do have purposeful solutions to gain access to and retrieve all the data that we need, and therefore are creating ever improved ways to do so regularly. We ought to expect only ever improved ways of accessing, retrieving and taking advantage of kept information down the road.