According to other websites, Scala is faster than Java. Some programmers even claim that Scala is faster than Java. But the Scala compiler supports an optimisation technique called tail call recursion. This optimisation makes Scala code compile faster than Java code.
Some of the more complex features of the language (tuples, functions, macros, to name a few) ultimately make it easier for the developer to write better code and increase performance by programming in Scala. One thing you may not know about Scala is that it was originally developed at the Swiss university EPFL in an attempt to apply recent innovations in programming language research to a language that could gain traction in the mainstream, much like Java. This Spark certification training course helps you master both the essential skills of the open source Apache Spark framework and the Scala programming language. Scala is a type-safe JVM language that incorporates both object-oriented and functional programming in an extremely concise, logical and extraordinarily powerful language.
But Scala developers also recognised the incredible value proposition of functional programming (the ability to develop code without regard to state). Scala enough to give you a preview of Scala's power and capabilities and whet your appetite to learn the language. Coupled with the superior functional programming idioms available to take advantage of multi-core CPU architectures, Scala has the right mix of the popular object-oriented paradigm. ZDNet cites Scala as one of the most popular programming languages that can get you a job interview.
For a Java developer, learning a classical functional programming language like Haskell or OCaml is much harder than Scala. As in other functional programming languages, in Scala, functions are first-class citizens (meaning you can pass them around as values), and Scala also supports anonymous functions and currying (partial application of multi-argument functions). As a result, there are indeed code distinctions and paradigm shifts that can make early learning of Scala programming a bit more difficult, but the result is a much cleaner and well-organised language that is ultimately easier to use and increases productivity. The popularity and use of Scala is growing rapidly, as evidenced by the increasing number of vacancies for Scala developers.
In fact, the difference between the use of collections in Java and Scala, in terms of built-in functionality, is so stark that it is usually very rare to find "for loops in Scala code - they are simply a sub-optimal way of applying operations to collections in most cases. With a growing Scala community on the forums, it is not difficult to find an answer to any Scala question, which adds to your learning experience. This combination of features makes it possible to write Scala programs that are quite concise and elegant.