Question : T-SQL Query

Is there a way to rewrite this query so that it would run faster? 
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SELECT
	a.*,
	(SELECT COUNT(*) FROM MyTable asub WHERE Field1 = 'MyValue' AND asub.ID = a.ID)
FROM
	MyTable a
WHERE
	a.Feild1 = 'MyValue'

Answer : T-SQL Query

This should do:

SELECT *, COUNT(*) over (Partition by ID) count_value
FROM MyTable
WHERE a.Feild1 = 'MyValue'
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