可以并行运行2个Linq查询吗? [英] Can 2 Linq Queries be run parallel?
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问题描述
我有 2 个 Linq 查询,第一个 Linq 查询返回 1148 条记录,第二个返回 6667 条记录.他们需要执行8分钟.有什么方法可以使它们在并行运行时更快?
I have 2 Linq Queries, 1st Linq Query returns 1148 records and 2nd returns 6667 records. They take 8 minutes in execution. Is there any way to make them faster while running parallel?
var productbacklogworkitem =
(from w in workItemcollectionList where w.Type.Name == "Product Backlog Item" select new {
Id = w.Id,
Name = w.Title,
FID = (w.WorkItemLinks.Count > 0) ? ((w.WorkItemLinks[0].LinkTypeEnd.Name.ToString() != "Child") ? w.WorkItemLinks[0].TargetId : 0) : 0,
Type = w.Type.Name,
State =w.State,
priorty = Convert.ToInt32(w.Fields["Priority"].Value),
Size = Convert.ToInt32(w.Fields["Effort"].Value),
StoryPoints = Convert.ToInt32(w.Fields["Story Points"].Value),
DoneStatus = w.Fields["Done Status"].Value.ToString(),
StoryOwner = w.Fields["Story Owner"].Value.ToString(),
Assignedto = w.Fields["Assigned To"].Value.ToString(),
StoryAuthor = w.Fields["Story Author"].Value.ToString(),
IterationPath = w.IterationPath
}).ToList();
var taskbugsworkitem =
(from w in workItemcollectionList where (w.Type.Name == "Task" || w.Type.Name == "Bug") && (w.WorkItemLinks.Count > 0) select new {
Id = w.Id,
Name = w.Title,
Type = w.Type.Name,
Storyid = w.WorkItemLinks[0].TargetId,
status = w.State,
IterationPath = w.IterationPath,
Assignedto = w.Fields["Assigned To"].Value.ToString(),
priorty = Convert.ToInt32(w.Fields["Priority"].Value),
effort = Convert.ToInt32(w.Fields["effort"].Value),
Completed = (w.Type.Name== "Task") ? Convert.ToInt32(w.Fields["Completed"].Value):0
}) .ToList();
推荐答案
您可以使用 Task
使两个查询并行进行.
You can use Task
to make also two queries parallel.
Task<ResultClass1> t1 = Task<ResultClass1>.Run(() =>
{
var productbacklogworkitem =
(from w in workItemcollectionList
where w.Type.Name == "Product Backlog Item"
select new ResultClass1
{
Id = w.Id,
Name = w.Title,
FID = (w.WorkItemLinks.Count > 0) ? ((w.WorkItemLinks[0].LinkTypeEnd.Name.ToString() != "Child") ? w.WorkItemLinks[0].TargetId : 0) : 0,
Type = w.Type.Name,
State = w.State,
priorty = Convert.ToInt32(w.Fields["Priority"].Value),
Size = Convert.ToInt32(w.Fields["Effort"].Value),
StoryPoints = Convert.ToInt32(w.Fields["Story Points"].Value),
DoneStatus = w.Fields["Done Status"].Value.ToString(),
StoryOwner = w.Fields["Story Owner"].Value.ToString(),
Assignedto = w.Fields["Assigned To"].Value.ToString(),
StoryAuthor = w.Fields["Story Author"].Value.ToString(),
IterationPath = w.IterationPath
}).ToList();
return ResultClass1;
});
Task<ResultClass2> t2 = Task<ResultClass2>.Run(() =>
{
var taskbugsworkitem =
(from w in workItemcollectionList
where (w.Type.Name == "Task" || w.Type.Name == "Bug") && (w.WorkItemLinks.Count > 0)
select new ResultClass2
{
Id = w.Id,
Name = w.Title,
Type = w.Type.Name,
Storyid = w.WorkItemLinks[0].TargetId,
status = w.State,
IterationPath = w.IterationPath,
Assignedto = w.Fields["Assigned To"].Value.ToString(),
priorty = Convert.ToInt32(w.Fields["Priority"].Value),
effort = Convert.ToInt32(w.Fields["effort"].Value),
Completed = (w.Type.Name == "Task") ? Convert.ToInt32(w.Fields["Completed"].Value) : 0
}).ToList();
return taskbugsworkitem;
});
Task.WaitAll(t1, t2);
// get results from these
t1.Result;
t2.Result;
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