Great ways to improve java performance

www.sainivas.com,[object Object],1,[object Object]

Why performance is so important?,[object Object],Java,[object Object],2,[object Object],www.sainivas.com,[object Object]

Imagine a world where everything is UNLIMITED,[object Object],3,[object Object],www.sainivas.com,[object Object]

Sorry!!You are in a world where everything is LIMITED,[object Object],4,[object Object],www.sainivas.com,[object Object]

Why performance matters?,[object Object],90% of requirements are complex,[object Object],50% of apps share the same server,[object Object],10% increase in end users every day,[object Object],Performance should be planned initially and not inspected later.,[object Object],5,[object Object],www.sainivas.com,[object Object]

Great ways to improveJava Performance,[object Object],By B. Sai Prasad,[object Object],6,[object Object],www.sainivas.com,[object Object],Simple,[object Object]

Introduction,[object Object],Java Puzzles,[object Object],Short program,[object Object],Where is the issue?,[object Object],How to fix?,[object Object],What did you learn?,[object Object],7,[object Object],www.sainivas.com,[object Object]

Puzzle #1,[object Object],8,[object Object],www.sainivas.com,[object Object]

Moral #1new operator creates a new object,[object Object],“new operator can be avoided by re-using byte arrays, or re-using objects”,[object Object],9,[object Object],www.sainivas.com,[object Object]

Moral #2Creating a Double from a string takes about 15 times than from a number,[object Object],“Use primitive data types for constructors rather than String objects.”,[object Object],11,[object Object],www.sainivas.com,[object Object]

Moral #3length() call in a tight loop can hit performance,[object Object],“String length is pre-computed, stored in a local variable and used it in a tight loop”,[object Object],13,[object Object],www.sainivas.com,[object Object]

Moral #4Default constructor is added automatically by compiler.,[object Object],“Generated constructor invokes the super class constructor.”,[object Object],15,[object Object],www.sainivas.com,[object Object]

Moral #5Minimize method calls by method inlining,[object Object],“Inlining is done by expanding the inlined method’s code in the code that calls the method”,[object Object],17,[object Object],www.sainivas.com,[object Object]

Moral #6System.arraycopy()efficiently copies one array to another,[object Object],“For very short arrays, use of this method may be counterproductive, because of overhead in actually calling the method”,[object Object],19,[object Object],www.sainivas.com,[object Object]

Moral #7BufferedReader reads characters in chunks,[object Object],“the read() method found in BufferedReader simply returns characters from a buffer”,[object Object],21,[object Object],www.sainivas.com,[object Object]

Moral #8Reuse. Reuse. Reuse.,[object Object],“It is better to reuse the java libraries than creating something new”,[object Object],23,[object Object],www.sainivas.com,[object Object]

Video,[object Object],www.sainivas.com,[object Object],24,[object Object]

Great ways to improve java performance

Great ways to improve java performance

Recomendados

Mais conteúdo relacionado

Similar a Great ways to improve java performance

Similar a Great ways to improve java performance(20)

Último

Último(20)

Great ways to improve java performance