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singleflight: increase concurrency efficieny of dochan #27

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singleflight: increase concurrency efficieny of dochan #27

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3 changes: 1 addition & 2 deletions singleflight/singleflight.go
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Original file line number Diff line number Diff line change
Expand Up @@ -154,12 +154,11 @@ func (g *Group) doCall(c *call, key string, fn func() (interface{}, error)) {
}

g.mu.Lock()
defer g.mu.Unlock()
c.wg.Done()
if g.m[key] == c {
delete(g.m, key)
}

g.mu.Unlock()
if e, ok := c.err.(*panicError); ok {
// In order to prevent the waiting channels from being blocked forever,
// needs to ensure that this panic cannot be recovered.
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