parallel processing - Clever aggregating of tuples in C# -


i processing complex query in parallel. called methods lot of tuple<ienumerable<object>, int> objects. aggregate them quickly, .aggregate (code below) not best option. right way it?

public static tuple<ienumerable<object>, int> parse(object obj) {     var ieo = new list<object>();     var x = 5;     return new tuple<ienumerable<object>, int>(ieo, x); }  public static void query(list<object> obj) {     var result = obj         .asparallel()         .select(o => parse(o))         . // aggregate , tuple of:           // - flattened ienumerable<object>           // - summed second items }

and aggregate suggestion, slow , looks terribly. works.

        .aggregate((t1, t2) => new tuple<ienumerable<object>, int>(t1.item1.concat(t2.item1), t1.item2 + t2.item2));

you can write custom flattener.

public static tuple<ienumerable<t>, int> magicflatten<t>(   ienumerable<tuple<ienumerable<t>, int>> tuplecrap)  {    var item1 = tuplecrap.selectmany(x => x.item1);    var item2 = tuplecrap.sum(x => x.item2);    return new tuple<...>(item1, item2); }

and later can use it:

.asparallel() .select(o => parse(o)) .magicflatten();

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