70 lines
2.1 KiB
Markdown
70 lines
2.1 KiB
Markdown
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Size of table is 122,173,606 bytes for all benchmarks.
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# BenchmarkRead
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```
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$ go test -bench ^BenchmarkRead$ -run ^$ -count 3
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goos: linux
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goarch: amd64
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pkg: github.com/dgraph-io/badger/table
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BenchmarkRead-16 10 153281932 ns/op
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BenchmarkRead-16 10 153454443 ns/op
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BenchmarkRead-16 10 155349696 ns/op
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PASS
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ok github.com/dgraph-io/badger/table 23.549s
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```
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Size of table is 122,173,606 bytes, which is ~117MB.
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The rate is ~750MB/s using LoadToRAM (when table is in RAM).
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To read a 64MB table, this would take ~0.0853s, which is negligible.
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# BenchmarkReadAndBuild
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```go
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$ go test -bench BenchmarkReadAndBuild -run ^$ -count 3
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goos: linux
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goarch: amd64
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pkg: github.com/dgraph-io/badger/table
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BenchmarkReadAndBuild-16 2 945041628 ns/op
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BenchmarkReadAndBuild-16 2 947120893 ns/op
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BenchmarkReadAndBuild-16 2 954909506 ns/op
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PASS
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ok github.com/dgraph-io/badger/table 26.856s
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```
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The rate is ~122MB/s. To build a 64MB table, this would take ~0.52s. Note that this
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does NOT include the flushing of the table to disk. All we are doing above is
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reading one table (which is in RAM) and write one table in memory.
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The table building takes 0.52-0.0853s ~ 0.4347s.
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# BenchmarkReadMerged
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Below, we merge 5 tables. The total size remains unchanged at ~122M.
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```go
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$ go test -bench ReadMerged -run ^$ -count 3
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BenchmarkReadMerged-16 2 954475788 ns/op
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BenchmarkReadMerged-16 2 955252462 ns/op
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BenchmarkReadMerged-16 2 956857353 ns/op
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PASS
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ok github.com/dgraph-io/badger/table 33.327s
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```
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The rate is ~122MB/s. To read a 64MB table using merge iterator, this would take ~0.52s.
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# BenchmarkRandomRead
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```go
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go test -bench BenchmarkRandomRead$ -run ^$ -count 3
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goos: linux
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goarch: amd64
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pkg: github.com/dgraph-io/badger/table
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BenchmarkRandomRead-16 300000 3596 ns/op
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BenchmarkRandomRead-16 300000 3621 ns/op
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BenchmarkRandomRead-16 300000 3596 ns/op
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PASS
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ok github.com/dgraph-io/badger/table 44.727s
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```
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For random read benchmarking, we are randomly reading a key and verifying its value.
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