一个有趣的内存泄漏。有人知道为什么吗?
foreach (int x in Enumerable.Range(0, 1_000_000)
.Select(async i => i))
{
}
GC.Collect();
Console.WriteLine(GC.GetTotalAllocatedBytes()); // 1036542160
foreach (int x in Enumerable.Range(0, 1_000_000)
.Select(async i => i))
{
}
GC.Collect();
Console.WriteLine(GC.GetTotalAllocatedBytes()); // 2072860704
foreach (int x in Enumerable.Range(0, 1_000_000)
.Select(async i => i))
{
}
GC.Collect();
Console.WriteLine(GC.GetTotalAllocatedBytes()); // 3109160008
位置:
static class SelectAsync
{
public static IEnumerable<TResult> Select<T, TResult>(
this IEnumerable<T> source, Func<T, Task<TResult>> selector) =>
source
.ToObservable()
.Select(value => Observable.FromAsync(() => selector(value)))
.Concat()
.ToEnumerable();
}