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50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
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t = db.geo2
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t.drop();
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n = 1
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for ( var x=-100; x<100; x+=2 ){
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for ( var y=-100; y<100; y+=2 ){
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t.insert( { _id : n++ , loc : [ x , y ] } )
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}
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}
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t.ensureIndex( { loc : "2d" } )
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fast = db.runCommand( { geoNear : t.getName() , near : [ 50 , 50 ] , num : 10 } );
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slow = db.runCommand( { geoNear : t.getName() , near : [ 50 , 50 ] , num : 10 , start : "11" } );
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printjson(fast.stats);
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printjson(slow.stats);
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v = "\n" + tojson( fast ) + "\n" + tojson( slow );
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assert.lt( fast.stats.nscanned * 10 , slow.stats.nscanned , "A1" + v );
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assert.lt( fast.stats.objectsLoaded , slow.stats.objectsLoaded , "A2" + v );
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assert.eq( fast.stats.avgDistance , slow.stats.avgDistance , "A3" + v );
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function a( cur ){
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var total = 0;
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var outof = 0;
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while ( cur.hasNext() ){
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var o = cur.next();
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total += Geo.distance( [ 50 , 50 ] , o.loc );
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outof++;
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}
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return total/outof;
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}
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assert.close( fast.stats.avgDistance , a( t.find( { loc : { $near : [ 50 , 50 ] } } ).limit(10) ) , "B1" )
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assert.close( 1.33333 , a( t.find( { loc : { $near : [ 50 , 50 ] } } ).limit(3) ) , "B2" );
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assert.close( fast.stats.avgDistance , a( t.find( { loc : { $near : [ 50 , 50 ] } } ).limit(10) ) , "B3" );
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printjson( t.find( { loc : { $near : [ 50 , 50 ] } } ).explain() )
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assert.lt( 3 , a( t.find( { loc : { $near : [ 50 , 50 ] } } ).limit(50) ) , "C1" )
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assert.gt( 3 , a( t.find( { loc : { $near : [ 50 , 50 , 3 ] } } ).limit(50) ) , "C2" )
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assert.gt( 3 , a( t.find( { loc : { $near : [ 50 , 50 ] , $maxDistance : 3 } } ).limit(50) ) , "C3" )
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