dns-suite.js/node_modules/qap/bench/small-pattern-data-rate-ben...

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2017-01-14 02:04:27 +00:00
var log = console.log
, assert = require( 'assert' )
, QuickParser = require( '../' )
//megabytes
, defaultSize = 700.1
// pre-record indexes
, indexes = []
// build a weird buffer
, buildTestBuffer = function ( p, MBsize, gapFactor ) {
var s = Date.now(),
mtime = 0,
len = p.length,
gap = Math.pow( len, ( gapFactor && gapFactor > 1 ) ? gapFactor : 3 ),
mb = 1024 * 1024,
size = MBsize || defaultSize,
tSize = parseInt( size * mb, 10 ),
str = '\r\nContent-Disposition: form-data\r\nLorem\
Ipsum et Dolor sit amet, Quisquisce\r\n\r\n';
for ( var i = 0, t = new Buffer( tSize ); i + len < tSize; i += len ){
if ( ( i % ( gap ) ) === 0 ) {
t.write( p.toString() + str, i );
indexes.push( i );
} else {
t[ i ] = i % 255;
}
}
mtime = Date.now() - s;
log( '- current pattern:', JSON.stringify( p.toString() ) );
log( '- pattern length is %d bytes', len );
log( '- current gap factor is', ( gapFactor ) ? gapFactor : 3 );
log( '- patterns gap (distance) is %d KBytes', ( gap / 1024 ).toFixed( 2 ) );
// log( ' - plength / pgap:', len / gap );
log( '- buffer creation time:', mtime / 1000, 'secs' );
return t;
}
, bsize
, gapfactor
, pattern = '---------------------------2046863043300497616870820724\r\n'
;
process.argv.forEach( function ( val, index, array ) {
( index === 2 ) ? ( bsize = parseInt( val, 10 ) ) : null;
( index === 3 ) ? ( gapfactor = parseInt( val, 10 ) ) : null;
( index === 4 ) ? ( pattern = ( ( val.length > 1 ) && ( val.length < 255 ) ) ? ( '--' + val + '\r\n' ) : pattern ) : null;
} );
var p = new Buffer( pattern )
, t = buildTestBuffer( p, bsize, gapfactor )
, smem = process.memoryUsage()
, qap = QuickParser( p )
, emem = process.memoryUsage()
, stime = Date.now()
, results = qap.parse( t )
, elapsed = Date.now() - stime
;
log( '- test buffer size is %d MBytes', bsize || defaultSize );
log( '- check if results length is equal to', indexes.length );
assert.equal( results.length, indexes.length );
log( '- compare results and pre-defined indexes' );
assert.deepEqual( results, indexes );
log( '- tables memory usage is %d KBytes', ( ( emem.rss - smem.rss ) / 1024 ).toFixed( 1 ) );
log( '- tables v8++ heap usage is %d KBytes', ( ( emem.heapUsed - smem.heapUsed ) / 1024 ).toFixed( 1 ) );
log( '- results matched are', results.length );
log( '- total elapsed time is %d secs', elapsed / 1000 );
log( '- parsing data rate is %d Gbit/s', ( ( 8 * ( bsize || defaultSize ) / ( elapsed / 1000 ) ) / 1024 ).toFixed( 2 ) );