Matthew Dawson df2c03a6a4 repository/master_index: Optimize Index.Lookup() ... When looking up a blob in the master index, with several indexes present in the master index, a significant amount of time is spent generating errors for each failed lookup. However, these errors are often used to check if a blob is present, but the contents are not inspected making the overhead of the error not useful. Instead, change Index.Lookup (and Index.LookupSize) to instead return a boolean denoting if the blob was found instead of an error. Also change all the calls to these functions to handle the new function signature. benchmark old ns/op new ns/op delta BenchmarkMasterIndexLookupSingleIndex-6 820 897 +9.39% BenchmarkMasterIndexLookupMultipleIndex-6 12821 2001 -84.39% BenchmarkMasterIndexLookupSingleIndexUnknown-6 5378 492 -90.85% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 17026 1649 -90.31% benchmark old allocs new allocs delta BenchmarkMasterIndexLookupSingleIndex-6 9 9 +0.00% BenchmarkMasterIndexLookupMultipleIndex-6 59 19 -67.80% BenchmarkMasterIndexLookupSingleIndexUnknown-6 22 6 -72.73% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 72 16 -77.78% benchmark old bytes new bytes delta BenchmarkMasterIndexLookupSingleIndex-6 160 160 +0.00% BenchmarkMasterIndexLookupMultipleIndex-6 3200 240 -92.50% BenchmarkMasterIndexLookupSingleIndexUnknown-6 1232 48 -96.10% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 4272 128 -97.00%		2018-01-23 22:25:56 -05:00
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testdata	Moves files	2017-07-23 14:19:13 +02:00
doc.go	Moves files	2017-07-23 14:19:13 +02:00
index_test.go	repository/master_index: Optimize Index.Lookup()	2018-01-23 22:25:56 -05:00
index.go	repository/master_index: Optimize Index.Lookup()	2018-01-23 22:25:56 -05:00
key.go	backend: Only return top-level files for most dirs	2017-12-14 19:14:16 +01:00
master_index_test.go	repository/master_index: Optimize Index.Lookup()	2018-01-23 22:25:56 -05:00
master_index.go	repository/master_index: Optimize Index.Lookup()	2018-01-23 22:25:56 -05:00
packer_manager_test.go	repo: Split packers for tree and data	2017-09-22 15:36:47 +02:00
packer_manager.go	replace ad-hoc context.TODO() with gopts.ctx, so that cancellation	2017-12-03 07:22:14 -05:00
parallel_test.go	Remove all dot-imports	2017-10-02 15:06:39 +02:00
parallel.go	Ignore files with invalid name in the repo	2017-09-10 11:00:07 +02:00
pool.go	Moves files	2017-07-23 14:19:13 +02:00
repack_test.go	repository/master_index: Optimize Index.Lookup()	2018-01-23 22:25:56 -05:00
repack.go	replace ad-hoc context.TODO() with gopts.ctx, so that cancellation	2017-12-03 07:22:14 -05:00
repository_test.go	replace ad-hoc context.TODO() with gopts.ctx, so that cancellation	2017-12-03 07:22:14 -05:00
repository.go	repository/master_index: Optimize Index.Lookup()	2018-01-23 22:25:56 -05:00
testing.go	Rename KDFParams -> Params	2017-10-28 10:28:29 +02:00