tinybench
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🔎 A simple, tiny and lightweight benchmarking library!
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JavaScript
const 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i.EdgeRuntime==`string`?D=`edge-light`:i.__lagon__?D=`lagon`:i.fastly?D=`fastly`:i.$262&&i.lockdown&&i.AsyncDisposableStack?D=`moddable`:i.d8?(D=`v8`,O=typeof i.version==`function`?i.version():`unknown`):i.inIon&&i.performance&&i.performance.mozMemory?D=`spidermonkey`:typeof i.$==`object`&&i.$!==null&&`IsHTMLDDA`in i.$?D=`jsc`:i.window&&i.navigator&&(D=`browser`),{runtime:D,version:O}}function hasNavigatorWithUserAgent(i=globalThis){return typeof i.navigator==`object`&&i.navigator!==null&&typeof i.navigator.userAgent==`string`}const{runtime,version:runtimeVersion}=detectRuntime(),nToMs=i=>Number(i)/1e6,mToNs=i=>Number(i)*1e6,mToMs=i=>i,nBigintToMs=i=>Number(i)/1e6,mToNsBigint=i=>BigInt(i)*1000000n,formatNumber=(i,D=5,O=2)=>{if(i===1/0)return`+∞`;if(i===-1/0)return`-∞`;if(i!==i)return`NaN`;let k=Math.abs(i);if(k>=10**D)return i.toFixed();if(k<10**(D-O))return i.toFixed(O);let A=Math.min(Math.max(0,D-(Math.floor(Math.log10(k))+1)),O);return i.toFixed(A)},isPromiseLike=i=>i!==null&&(typeof i==`object`||typeof i==`function`)&&typeof i.then==`function`,AsyncFunctionConstructor=(async()=>{}).constructor,isAsyncFunction=i=>typeof i==`function`&&i.constructor===AsyncFunctionConstructor,isFnAsyncResource=i=>{if(i==null)return!1;if(isAsyncFunction(i))return!0;try{let O=i(),k=isPromiseLike(O);if(k)try{O.then(emptyFunction).catch(emptyFunction)}catch{}return k}catch{return!1}},isValidSamples=i=>Array.isArray(i)&&i.length!==0;function sortSamples(i){i.sort(sortFn)}const meanAndVariance=i=>{let D=i.length;if(D===1)return{mean:i[0],vr:0};let O=0,k=0,A=0,j=0,M=0;for(;M<D;)A=i[M++],j=A-O,O+=j/M,k+=j*(A-O);return{mean:O,vr:k/(D-1)}},quantileSorted=(i,D)=>{let O=(i.length-1)*D,k=Math.floor(O);return k+1<i.length?i[k]+(O-k)*(i[k+1]-i[k]):i[k]},sortFn=(i,D)=>i-D,absoluteDeviationMean=(i,D)=>{let O=0,k=i.length,A=0;for(;A<k;)O+=(Math.abs(i[A++]-D)-O)/A;return O};function absoluteDeviationMedian(i,D){let O=i.length;if(O===1)return 0;let k=O>>1,A=O+1>>1,j=0,M=k,N,P,F,I,L,R;for(;j<=M;){if(N=j+M>>1,P=A-N,F=N===0?-1/0:D-i[k-N],L=N===k?1/0:D-i[k-N-1],I=P===0?-1/0:i[k+P-1]-D,R=P===O-k?1/0:i[k+P]-D,F<=R&&I<=L)return O&1?Math.max(F,I):(Math.max(F,I)+Math.min(L,R))/2;F>R?M=N-1:j=N+1}return 0}function computeStatistics(D,O=!1){let{mean:k,vr:A}=meanAndVariance(D),j=Math.sqrt(A),M=j/Math.sqrt(D.length),N=D.length-1,P=tTable[N||1]??tTable[0],F=M*P,I=k===0?1/0:F/Math.abs(k)*100,L=quantileSorted(D,.5);return{aad:absoluteDeviationMean(D,k),critical:P,df:N,mad:absoluteDeviationMedian(D,L),max:D[N],mean:k,min:D[0],moe:F,p50:L,p75:quantileSorted(D,.75),p99:quantileSorted(D,.99),p995:quantileSorted(D,.995),p999:quantileSorted(D,.999),rme:I,samples:O?D:void 0,samplesCount:D.length,sd:j,sem:M,variance:A}}const assert=(i,D)=>{if(!i){let i=Error.stackTraceLimit;try{Error.stackTraceLimit=0;let O=Error(D);throw Error.stackTraceLimit=i,i!==0&&Error.captureStackTrace(O,assert),O}finally{Error.stackTraceLimit=i}}},toError=i=>{switch(typeof i){case`function`:return Error(i.name);case`object`:if(i!==null)return i instanceof Error?i:Error(i.message??``);case`undefined`:return Error();case`string`:return Error(i);default:return Error(String(i))}},defaultConvertTaskResultForConsoleTable=i=>{let D=i.result.state;return{"Task name":i.name,...D===`aborted-with-statistics`||D===`completed`?{"Latency avg (ns)":`${formatNumber(mToNs(i.result.latency.mean))} \xb1 ${i.result.latency.rme.toFixed(2)}%`,"Latency med (ns)":`${formatNumber(mToNs(i.result.latency.p50))} \xb1 ${formatNumber(mToNs(i.result.latency.mad))}`,"Throughput avg (ops/s)":`${Math.round(i.result.throughput.mean).toString()} \xb1 ${i.result.throughput.rme.toFixed(2)}%`,"Throughput med (ops/s)":`${Math.round(i.result.throughput.p50).toString()} \xb1 ${Math.round(i.result.throughput.mad).toString()}`,Samples:i.result.latency.samplesCount}:D===`errored`?{Error:i.result.error.message,Stack:i.result.error.stack??`N/A`}:{"Latency avg (ns)":`N/A`,"Latency med (ns)":`N/A`,"Throughput avg (ops/s)":`N/A`,"Throughput med (ops/s)":`N/A`,Samples:`N/A`,Remarks:D},...D===`aborted-with-statistics`&&{Remarks:D}}},withConcurrency=async i=>{let{fn:D,iterations:O,limit:k,signal:A,time:j=0,timestampProvider:M=performanceNowTimestampProvider}=i,N=O===0?k:Math.max(0,Math.min(k,O)),P=[],F=[],I=!0,L=0,R=Number.isFinite(j)&&j>0,z=O>0,B=0,V=M.fn,H=z?R?()=>I&&L++<O&&(V()<B||(I=!1)):()=>I&&L++<O:R?()=>I&&(V()<B||(I=!1)):()=>I,U=i=>{I&&F.push(i)},W=i=>{P.push(toError(i))},G=()=>I=!1;if(A){if(A.aborted)return[];A.addEventListener(`abort`,G)}let K=async()=>{for(;H();)try{U(await D())}catch(i){I=!1,W(i);break}};R&&(B=V()+M.fromMs(j));let q=Array.from({length:N},()=>K());if(await Promise.allSettled(q),P.length===0)return F;throw P.length===1?P[0]:AggregateError(P,`Multiple errors occurred during concurrent execution`)},performanceNow=globalThis.performance.now.bind(globalThis.performance),performanceNowTimestampProvider={fn:performanceNow,fromMs:mToMs,name:`performanceNow`,toMs:mToMs},hrtimeBigint=globalThis.process?.hrtime?.bigint.bind(globalThis.process?.hrtime)??(()=>{throw Error(`hrtime.bigint() is not supported in this JS environment`)}),hrtimeNow=()=>nToMs(Number(hrtimeBigint())),hrtimeNowTimestampProvider={fn:hrtimeBigint,fromMs:mToNsBigint,name:`hrtimeNow`,toMs:nBigintToMs},bunNanoseconds=globalThis.Bun?.nanoseconds,bunNanosecondsTimestampProvider=bunNanoseconds?{fn:bunNanoseconds,fromMs:mToNs,name:`bunNanoseconds`,toMs:nToMs}:void 0;function createCustomTimestampProvider(i){return{fn:i,fromMs:mToMs,name:`custom`,toMs:mToMs}}const getTimestampProviderByJSRuntime=(i=runtime)=>i===`bun`?bunNanosecondsTimestampProvider:i===`deno`?performanceNowTimestampProvider:i===`node`?hrtimeNowTimestampProvider:performanceNowTimestampProvider,getTimestampProvider=i=>{switch(typeof i){case`function`:return createCustomTimestampProvider(i);case`string`:switch(i){case`auto`:return getTimestampProviderByJSRuntime();case`bunNanoseconds`:return bunNanosecondsTimestampProvider??performanceNowTimestampProvider;case`hrtimeNow`:return hrtimeNowTimestampProvider;default:return performanceNowTimestampProvider}case`object`:return i===null?performanceNowTimestampProvider:(assert(isValidTimestampProvider(i),`Invalid Timestamp Provider object`),i);case`undefined`:return performanceNowTimestampProvider;default:throw Error(`Invalid value for 'timestampProvider' or 'now'`)}};function isValidTimestampProvider(i){return typeof i==`object`&&!!i&&typeof i.fn==`function`&&typeof i.name==`string`&&typeof i.toMs==`function`&&typeof i.fromMs==`function`}const hookNames=[`afterAll`,`beforeAll`,`beforeEach`,`afterEach`],abortableStates=[`not-started`,`started`],notStartedTaskResult={state:`not-started`},abortedTaskResult={state:`aborted`},startedTaskResult={state:`started`};var Task=class extends EventTarget{get name(){return this.#a}get result(){return{...this.#o,runtime:this.#n.runtime,runtimeVersion:this.#n.runtimeVersion,timestampProviderName:this.#n.timestampProvider.name}}get runs(){return this.#c}#e=!1;#t;#n;#r;#i;#a;#o=notStartedTaskResult;#s;#c=0;#l;#u;#d;#f;constructor(i,D,O,k={}){super(),this.#n=i,this.#a=D,this.#r=O,this.#i=k,this.#t=k.async??isFnAsyncResource(O),this.#l=k.signal,this.#s=k.retainSamples??i.retainSamples,this.#d=i.timestampProvider,this.#u=i.timestampProvider.fn,this.#f=i.timestampProvider.toMs;for(let i of hookNames)this.#i[i]!=null&&assert(typeof this.#i[i]==`function`,`'${i}' must be a function if provided`);this.reset(!1),this.#l&&(this.#l.aborted?this.#_():this.#l.addEventListener(`abort`,this.#_.bind(this),{once:!0})),this.#n.signal&&(this.#n.signal.aborted?this.#_():this.#n.signal.addEventListener(`abort`,this.#_.bind(this),{once:!0}))}reset(i=!0){this.#c=0,this.#o=this.#e?abortedTaskResult:notStartedTaskResult,i&&this.dispatchEvent(new BenchEvent(`reset`,this))}async run(){if(this.#o.state!==`not-started`)return this;this.#o={state:`started`},this.dispatchEvent(new BenchEvent(`start`,this)),await this.#n.setup(this,`run`);let{error:i,samples:D}=await this.#p(`run`,this.#n.time,this.#n.iterations);return await this.#n.teardown(this,`run`),this.#y({error:i,latencySamples:D}),this}runSync(){if(this.#o.state!==`not-started`)return this;assert(this.#n.concurrency===null,"Cannot use `concurrency` option when using `runSync`"),this.#o=startedTaskResult,this.dispatchEvent(new BenchEvent(`start`,this)),assert(!isPromiseLike(this.#n.setup(this,`run`)),"`setup` function must be sync when using `runSync()`");let{error:i,samples:D}=this.#m(`run`,this.#n.time,this.#n.iterations);return assert(!isPromiseLike(this.#n.teardown(this,`run`)),"`teardown` function must be sync when using `runSync()`"),this.#y({error:i,latencySamples:D}),this}async warmup(){if(this.#o.state!==`not-started`)return;this.dispatchEvent(new BenchEvent(`warmup`,this)),await this.#n.setup(this,`warmup`);let{error:i}=await this.#p(`warmup`,this.#n.warmupTime,this.#n.warmupIterations);await this.#n.teardown(this,`warmup`),this.#v(i)}warmupSync(){if(this.#o.state!==`not-started`)return;this.dispatchEvent(new BenchEvent(`warmup`,this)),assert(!isPromiseLike(this.#n.setup(this,`warmup`)),"`setup` function must be sync when using `runSync()`");let{error:i}=this.#m(`warmup`,this.#n.warmupTime,this.#n.warmupIterations);assert(!isPromiseLike(this.#n.teardown(this,`warmup`)),"`teardown` function must be sync when using `runSync()`"),this.#v(i)}async#p(i,D,O){try{this.#i.beforeAll&&await this.#i.beforeAll.call(this,i);let k=0,A=[],j=async()=>{if(!this.#e)try{this.#i.beforeEach!=null&&await this.#i.beforeEach.call(this,i);let D=this.#t?await this.#h():this.#g();A.push(D),k+=D}finally{this.#i.afterEach!=null&&await this.#i.afterEach.call(this,i)}};if(this.#n.concurrency===`task`)await withConcurrency({fn:j,iterations:O,limit:Math.max(1,Math.floor(this.#n.threshold)),signal:this.#l??this.#n.signal,time:D,timestampProvider:this.#d}),this.#c=A.length;else for(;(k<D||A.length<O)&&!this.#e;)await j();return this.#i.afterAll!=null&&await this.#i.afterAll.call(this,i),isValidSamples(A)?{samples:A}:{}}catch(i){return{error:toError(i)}}}#m(i,D,O){try{this.#i.beforeAll&&assert(!isPromiseLike(this.#i.beforeAll.call(this,i)),"`beforeAll` function must be sync when using `runSync()`");let k=0,A=[],j=()=>{if(!this.#e)try{this.#i.beforeEach&&assert(!isPromiseLike(this.#i.beforeEach.call(this,i)),"`beforeEach` function must be sync when using `runSync()`");let D=this.#g();A.push(D),k+=D}finally{this.#i.afterEach&&assert(!isPromiseLike(this.#i.afterEach.call(this,i)),"`afterEach` function must be sync when using `runSync()`")}};for(;(k<D||A.length<O)&&!this.#e;)j();return this.#i.afterAll&&assert(!isPromiseLike(this.#i.afterAll.call(this,i)),"`afterAll` function must be sync when using `runSync()`"),isValidSamples(A)?{samples:A}:{}}catch(i){return{error:toError(i)}}}async#h(){let i=this.#u(),D=await this.#r.call(this),O=this.#f(this.#u()-i),k=getOverriddenDurationFromFnResult(D);return k===void 0?O:k}#g(){let i=this.#u(),D=this.#r.call(this),O=this.#f(this.#u()-i);assert(!isPromiseLike(D),"task function must be sync when using `runSync()`");let k=getOverriddenDurationFromFnResult(D);return k===void 0?O:k}#_(){if(this.#e=!0,abortableStates.includes(this.#o.state)){this.#o=abortedTaskResult;let i=new BenchEvent(`abort`,this);this.dispatchEvent(i),this.#n.dispatchEvent(i)}}#v(i){if(i){this.#o={state:`errored`,error:i};let D=new BenchEvent(`error`,this,i);if(this.dispatchEvent(D),this.#n.dispatchEvent(D),this.#n.throws)throw i}}#y({error:i,latencySamples:D}){if(isValidSamples(D)){this.#c=D.length,sortSamples(D);let i=computeStatistics(D,this.#s),O=i.mean,k=0,A=[];for(let i of D)i===0?A.push(O===0?0:1e3/O):(k+=i,A.push(1e3/i));sortSamples(A);let j=computeStatistics(A,this.#s);this.#o={state:this.#e?`aborted-with-statistics`:`completed`,latency:i,period:k/this.runs,throughput:j,totalTime:k}}else this.#e&&(this.#o=abortedTaskResult);if(i){this.#o={state:`errored`,error:i};let D=new BenchEvent(`error`,this,i);if(this.dispatchEvent(D),this.#n.dispatchEvent(D),this.#n.throws)throw i}let k=new BenchEvent(`cycle`,this);this.dispatchEvent(k),this.#n.dispatchEvent(k),this.dispatchEvent(new BenchEvent(`complete`,this))}};function getOverriddenDurationFromFnResult(i){return typeof i==`object`&&i&&`overriddenDuration`in i&&typeof i.overriddenDuration==`number`&&Number.isFinite(i.overriddenDuration)&&i.overriddenDuration>=0?i.overriddenDuration:void 0}var Bench=class extends EventTarget{concurrency;iterations;name;now;retainSamples;runtime;runtimeVersion;setup;signal;teardown;threshold;throws;time;timestampProvider;warmup;warmupIterations;warmupTime;get results(){return this.tasks.map(i=>i.result)}get tasks(){return[...this.#e.values()]}#e=new Map;constructor(i={}){super();let{name:k,...A}=i;this.name=k,this.runtime=runtime,this.runtimeVersion=runtimeVersion,this.concurrency=A.concurrency??null,this.threshold=A.threshold??1/0,this.time=A.time??1e3,this.iterations=A.iterations??64,assert(!(A.now!==void 0&&A.timestampProvider!==void 0),"Cannot set both `now` and `timestampProvider` options"),this.timestampProvider=getTimestampProvider(A.now??A.timestampProvider),this.now=()=>this.timestampProvider.toMs(this.timestampProvider.fn()),this.warmup=A.warmup??!0,this.warmupIterations=A.warmupIterations??16,this.warmupTime=A.warmupTime??250,this.setup=A.setup??emptyFunction,this.teardown=A.teardown??emptyFunction,this.throws=A.throws??!1,this.signal=A.signal,this.retainSamples=A.retainSamples===!0,this.signal&&this.signal.addEventListener(`abort`,()=>{this.dispatchEvent(new BenchEvent(`abort`))},{once:!0})}add(i,D,k={}){if(this.#e.has(i))throw Error(`Task "${i}" already exists`);{let A=new Task(this,i,D,k);this.#e.set(i,A),this.dispatchEvent(new BenchEvent(`add`,A))}return this}getTask(i){return this.#e.get(i)}remove(i){let D=this.getTask(i);return D&&(this.#e.delete(i),this.dispatchEvent(new BenchEvent(`remove`,D))),this}reset(){for(let i of this.#e.values())i.reset();this.dispatchEvent(new BenchEvent(`reset`))}async run(){this.warmup&&await this.#t(),this.dispatchEvent(new BenchEvent(`start`));let i=[];if(this.concurrency===`bench`){let D=[];for(let i of this.#e.values())D.push(i.run());i=await Promise.all(D)}else for(let D of this.#e.values())i.push(await D.run());return this.dispatchEvent(new BenchEvent(`complete`)),i}runSync(){assert(this.concurrency===null,"Cannot use `concurrency` option when using `runSync`"),this.warmup&&this.#n();let i=[];this.dispatchEvent(new BenchEvent(`start`));for(let D of this.#e.values())i.push(D.runSync());return this.dispatchEvent(new BenchEvent(`complete`)),i}table(i=defaultConvertTaskResultForConsoleTable){return this.tasks.map(i)}async#t(){if(this.dispatchEvent(new BenchEvent(`warmup`)),this.concurrency===`bench`){let i=[];for(let D of this.#e.values())i.push(D.warmup());await Promise.all(i)}else for(let i of this.#e.values())await i.warmup()}#n(){this.dispatchEvent(new BenchEvent(`warmup`));for(let i of this.#e.values())i.warmupSync()}};export{Bench,Task,formatNumber,hrtimeNow,nToMs,performanceNow as now};