improve(core): vertices and edges loading optimization #288
Description
Feature Description (功能描述)
ComputerOptions.INPUT_FILTER_CLASS default value is DefaultInputFilter.
org.apache.hugegraph.computer.core.input.filter.DefaultInputFilter
public class DefaultInputFilter implements InputFilter {
@Override
public Vertex filter(Vertex vertex) {
vertex.properties().clear();
return vertex;
}
@Override
public Edge filter(Edge edge) {
edge.properties().clear();
return edge;
}
}Load all properties first, then clear.
Could we specify some properties when loading vertices or edges? May could improve performance.
Just like mysql:
select a, b, cinstead of
select *org.apache.hugegraph.computer.core.input.hg.HugeVertexFetcher
@Override
public Iterator<Vertex> fetch(InputSplit split) {
Shard shard = toShard(split);
return this.client().traverser().iteratorVertices(shard,
this.pageSize());
}But it seems that the traverser api does not yet support specifying some properties to load vertices or edges on the server side.
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