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/*
* Copyright 2024 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import Benchmark
import CoreFoundation
import FlatBuffers
@usableFromInline
struct AA: NativeStruct {
public init(a: Double, b: Double) {
self.a = a
self.b = b
}
var a: Double
var b: Double
}
let benchmarks = {
let ints: [Int] = Array(repeating: 42, count: 100)
let bytes: [UInt8] = Array(repeating: 42, count: 100)
let str10 = (0...9).map { _ -> String in "x" }.joined()
let str100 = (0...99).map { _ -> String in "x" }.joined()
let array: [AA] = [
AA(a: 2.4, b: 2.4),
AA(a: 2.4, b: 2.4),
AA(a: 2.4, b: 2.4),
AA(a: 2.4, b: 2.4),
AA(a: 2.4, b: 2.4),
]
let metrics: [BenchmarkMetric] = [
.cpuTotal,
.wallClock,
.mallocCountTotal,
.releaseCount,
.peakMemoryResident,
]
let maxIterations = 1_000_000
let maxDuration: Duration = .seconds(3)
let singleConfiguration: Benchmark.Configuration = .init(
metrics: metrics,
warmupIterations: 1,
scalingFactor: .one,
maxDuration: maxDuration,
maxIterations: maxIterations)
let kiloConfiguration: Benchmark.Configuration = .init(
metrics: metrics,
warmupIterations: 1,
scalingFactor: .kilo,
maxDuration: maxDuration,
maxIterations: maxIterations)
let megaConfiguration: Benchmark.Configuration = .init(
metrics: metrics,
warmupIterations: 1,
scalingFactor: .mega,
maxDuration: maxDuration,
maxIterations: maxIterations)
Benchmark.defaultConfiguration = megaConfiguration
Benchmark("Allocating 1GB", configuration: singleConfiguration) { benchmark in
for _ in benchmark.scaledIterations {
blackHole(FlatBufferBuilder(initialSize: 1_024_000_000))
}
}
Benchmark("Clearing 1GB", configuration: singleConfiguration) { benchmark in
var fb = FlatBufferBuilder(initialSize: 1_024_000_000)
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
blackHole(fb.clear())
}
}
Benchmark("Strings 10") { benchmark in
var fb = FlatBufferBuilder(initialSize: 1<<20)
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
blackHole(fb.create(string: str10))
}
}
Benchmark("Strings 100") { benchmark in
var fb = FlatBufferBuilder(initialSize: 1<<20)
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
blackHole(fb.create(string: str100))
}
}
Benchmark("Vector 1 Bytes") { benchmark in
var fb = FlatBufferBuilder(initialSize: 1<<20)
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
blackHole(fb.createVector(bytes: bytes))
}
}
Benchmark("Vector 1 Ints") { benchmark in
var fb = FlatBufferBuilder(initialSize: 1<<20)
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
blackHole(fb.createVector(ints))
}
}
Benchmark("Vector 100 Ints") { benchmark in
var fb = FlatBufferBuilder(initialSize: 1<<20)
benchmark.startMeasurement()
for i in benchmark.scaledIterations {
blackHole(fb.createVector(ints))
}
}
Benchmark("Vector 100 Bytes") { benchmark in
var fb = FlatBufferBuilder(initialSize: 1<<20)
benchmark.startMeasurement()
for i in benchmark.scaledIterations {
blackHole(fb.createVector(bytes))
}
}
Benchmark("Vector 100 ContiguousBytes") { benchmark in
var fb = FlatBufferBuilder(initialSize: 1<<20)
benchmark.startMeasurement()
for i in benchmark.scaledIterations {
blackHole(fb.createVector(bytes: bytes))
}
}
Benchmark(
"FlatBufferBuilder Add",
configuration: kiloConfiguration)
{ benchmark in
var fb = FlatBufferBuilder(initialSize: 1024 * 1024 * 32)
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
let off = fb.create(string: "T")
let s = fb.startTable(with: 4)
fb.add(element: 3.2, def: 0, at: 2)
fb.add(element: 4.2, def: 0, at: 4)
fb.add(element: 5.2, def: 0, at: 6)
fb.add(offset: off, at: 8)
blackHole(fb.endTable(at: s))
}
}
Benchmark("Structs") { benchmark in
let rawSize = ((16 * 5) * benchmark.scaledIterations.count) / 1024
var fb = FlatBufferBuilder(initialSize: Int32(rawSize * 1600))
var offsets: [Offset] = []
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
let vector = fb.createVector(
ofStructs: array)
let start = fb.startTable(with: 1)
fb.add(offset: vector, at: 4)
offsets.append(Offset(offset: fb.endTable(at: start)))
}
let vector = fb.createVector(ofOffsets: offsets)
let start = fb.startTable(with: 1)
fb.add(offset: vector, at: 4)
let root = Offset(offset: fb.endTable(at: start))
fb.finish(offset: root)
}
Benchmark("Vector of Offsets") { benchmark in
let rawSize = ((16 * 5) * benchmark.scaledIterations.count) / 1024
var fb = FlatBufferBuilder(initialSize: Int32(rawSize * 1600))
benchmark.startMeasurement()
for _ in benchmark.scaledIterations {
let offsets = [
fb.create(string: "T"),
fb.create(string: "2"),
fb.create(string: "3"),
]
let off = fb.createVector(ofOffsets: [
fb.createVector(ofOffsets: offsets),
fb.createVector(ofOffsets: offsets),
])
let s = fb.startTable(with: 2)
fb.add(offset: off, at: 2)
blackHole(fb.endTable(at: s))
}
}
}
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