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df2c03a6a4
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% |
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| .. | ||
| testdata | ||
| .gitignore | ||
| background_linux.go | ||
| background.go | ||
| cleanup.go | ||
| cmd_backup.go | ||
| cmd_cat.go | ||
| cmd_check.go | ||
| cmd_debug.go | ||
| cmd_diff.go | ||
| cmd_dump.go | ||
| cmd_find.go | ||
| cmd_forget.go | ||
| cmd_generate.go | ||
| cmd_init.go | ||
| cmd_key.go | ||
| cmd_list.go | ||
| cmd_ls.go | ||
| cmd_migrate.go | ||
| cmd_mount.go | ||
| cmd_options.go | ||
| cmd_prune.go | ||
| cmd_rebuild_index.go | ||
| cmd_restore.go | ||
| cmd_snapshots.go | ||
| cmd_tag.go | ||
| cmd_unlock.go | ||
| cmd_version.go | ||
| doc.go | ||
| exclude_test.go | ||
| exclude.go | ||
| excludes | ||
| find.go | ||
| flags_test.go | ||
| format.go | ||
| global_debug.go | ||
| global_release.go | ||
| global.go | ||
| integration_fuse_test.go | ||
| integration_helpers_test.go | ||
| integration_helpers_unix_test.go | ||
| integration_helpers_windows_test.go | ||
| integration_test.go | ||
| local_layout_test.go | ||
| lock.go | ||
| main.go | ||
| table.go | ||