Node.js increase Memory

[Juan Sebastian]

Hi All

I'm Coding some trees in NodeJS

and after creating 1,000,000 elements and looping to get the top10 elements 

the process ends with these stats:

TOP 10 Products by ID:

{ Id: 31229, numSold: 99999741 }

{ Id: 724109, numSold: 99999702 }

{ Id: 228470, numSold: 99999663 }

{ Id: 252501, numSold: 99999630 }

{ Id: 764570, numSold: 99999462 }

{ Id: 525615, numSold: 99999414 }

{ Id: 789503, numSold: 99999379 }

{ Id: 428851, numSold: 99999260 }

{ Id: 533397, numSold: 99999244 }

{ Id: 202426, numSold: 99999146 }

Max Quantity Item : id: 31229 Quantity: 99,999,741

Min Quantity Item: id: 691832  Quantity: 76

Process: 4547ms

is there any way to improve the performance from the V8 side?

I've tried the following line but makes no significant difference

./node --max_executable_size=3048 --stack_size=102400 test.js

./node --max_old_space_size=3048 --stack_size=102400 test.js

I coded the same in Java and

by modifying the arguments to the JVM (increase the memory)

JRE Arguments -> -Xms1024m -Xmx2048m

the performance was significant faster: for 1,000,000 elements-> Time: 1730 ms

Any advice/trick will be welcomed

Best Regards

Juan S.

[Andrey]

If you are using same algorithm then 2x difference Java vs JS is not something surprising, I would expect this.

How do you compute top 10? With built-in Array.search + slice(0,10) I get ~2500ms and if I use binary heap tree ( 
https://github.com/tjfontaine/node-binaryheap ) (push every element and pop if tree length > 10) running time is down to 950ms

Also, try to benchmark your code after multiple runs as first run might use non-optimised code