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8e1e3844aa
The SemaphoreBackend now uniformly enforces the limit of concurrent backend operations. In addition, it unifies the parameter validation. The List() methods no longer uses a semaphore. Restic already never runs multiple list operations in parallel. By managing the semaphore in a wrapper backend, the sections that hold a semaphore token grow slightly. However, the main bottleneck is IO, so this shouldn't make much of a difference. The key insight that enables the SemaphoreBackend is that all of the complex semaphore handling in `openReader()` still happens within the original call to `Load()`. Thus, getting and releasing the semaphore tokens can be refactored to happen directly in `Load()`. This eliminates the need for wrapping the reader in `openReader()` to release the token. |
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| checker | ||
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| fs | ||
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| migrations | ||
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| restic | ||
| restorer | ||
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