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19
node_modules/@jridgewell/trace-mapping/LICENSE
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19
node_modules/@jridgewell/trace-mapping/LICENSE
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Copyright 2022 Justin Ridgewell <justin@ridgewell.name>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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193
node_modules/@jridgewell/trace-mapping/README.md
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node_modules/@jridgewell/trace-mapping/README.md
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# @jridgewell/trace-mapping
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> Trace the original position through a source map
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`trace-mapping` allows you to take the line and column of an output file and trace it to the
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original location in the source file through a source map.
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You may already be familiar with the [`source-map`][source-map] package's `SourceMapConsumer`. This
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provides the same `originalPositionFor` and `generatedPositionFor` API, without requiring WASM.
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## Installation
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```sh
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npm install @jridgewell/trace-mapping
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```
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## Usage
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```typescript
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import { TraceMap, originalPositionFor, generatedPositionFor } from '@jridgewell/trace-mapping';
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const tracer = new TraceMap({
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version: 3,
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sources: ['input.js'],
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names: ['foo'],
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mappings: 'KAyCIA',
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});
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// Lines start at line 1, columns at column 0.
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const traced = originalPositionFor(tracer, { line: 1, column: 5 });
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assert.deepEqual(traced, {
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source: 'input.js',
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line: 42,
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column: 4,
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name: 'foo',
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});
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const generated = generatedPositionFor(tracer, {
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source: 'input.js',
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line: 42,
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column: 4,
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});
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assert.deepEqual(generated, {
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line: 1,
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column: 5,
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});
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```
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We also provide a lower level API to get the actual segment that matches our line and column. Unlike
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`originalPositionFor`, `traceSegment` uses a 0-base for `line`:
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```typescript
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import { traceSegment } from '@jridgewell/trace-mapping';
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// line is 0-base.
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const traced = traceSegment(tracer, /* line */ 0, /* column */ 5);
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// Segments are [outputColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex]
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// Again, line is 0-base and so is sourceLine
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assert.deepEqual(traced, [5, 0, 41, 4, 0]);
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```
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### SectionedSourceMaps
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The sourcemap spec defines a special `sections` field that's designed to handle concatenation of
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output code with associated sourcemaps. This type of sourcemap is rarely used (no major build tool
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produces it), but if you are hand coding a concatenation you may need it. We provide an `AnyMap`
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helper that can receive either a regular sourcemap or a `SectionedSourceMap` and returns a
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`TraceMap` instance:
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```typescript
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import { AnyMap } from '@jridgewell/trace-mapping';
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const fooOutput = 'foo';
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const barOutput = 'bar';
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const output = [fooOutput, barOutput].join('\n');
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const sectioned = new AnyMap({
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version: 3,
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sections: [
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{
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// 0-base line and column
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offset: { line: 0, column: 0 },
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// fooOutput's sourcemap
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map: {
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version: 3,
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sources: ['foo.js'],
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names: ['foo'],
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mappings: 'AAAAA',
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},
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},
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{
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// barOutput's sourcemap will not affect the first line, only the second
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offset: { line: 1, column: 0 },
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map: {
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version: 3,
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sources: ['bar.js'],
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names: ['bar'],
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mappings: 'AAAAA',
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},
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},
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],
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});
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const traced = originalPositionFor(sectioned, {
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line: 2,
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column: 0,
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});
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assert.deepEqual(traced, {
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source: 'bar.js',
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line: 1,
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column: 0,
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name: 'bar',
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});
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```
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## Benchmarks
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```
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node v18.0.0
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amp.js.map
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trace-mapping: decoded JSON input x 183 ops/sec ±0.41% (87 runs sampled)
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trace-mapping: encoded JSON input x 384 ops/sec ±0.89% (89 runs sampled)
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trace-mapping: decoded Object input x 3,085 ops/sec ±0.24% (100 runs sampled)
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trace-mapping: encoded Object input x 452 ops/sec ±0.80% (84 runs sampled)
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source-map-js: encoded Object input x 88.82 ops/sec ±0.45% (77 runs sampled)
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source-map-0.6.1: encoded Object input x 38.39 ops/sec ±1.88% (52 runs sampled)
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Fastest is trace-mapping: decoded Object input
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trace-mapping: decoded originalPositionFor x 4,025,347 ops/sec ±0.15% (97 runs sampled)
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trace-mapping: encoded originalPositionFor x 3,333,136 ops/sec ±1.26% (90 runs sampled)
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source-map-js: encoded originalPositionFor x 824,978 ops/sec ±1.06% (94 runs sampled)
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source-map-0.6.1: encoded originalPositionFor x 741,300 ops/sec ±0.93% (92 runs sampled)
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source-map-0.8.0: encoded originalPositionFor x 2,587,603 ops/sec ±0.75% (97 runs sampled)
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Fastest is trace-mapping: decoded originalPositionFor
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***
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babel.min.js.map
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trace-mapping: decoded JSON input x 17.43 ops/sec ±8.81% (33 runs sampled)
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trace-mapping: encoded JSON input x 34.18 ops/sec ±4.67% (50 runs sampled)
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trace-mapping: decoded Object input x 1,010 ops/sec ±0.41% (98 runs sampled)
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trace-mapping: encoded Object input x 39.45 ops/sec ±4.01% (52 runs sampled)
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source-map-js: encoded Object input x 6.57 ops/sec ±3.04% (21 runs sampled)
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source-map-0.6.1: encoded Object input x 4.23 ops/sec ±2.93% (15 runs sampled)
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Fastest is trace-mapping: decoded Object input
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trace-mapping: decoded originalPositionFor x 7,576,265 ops/sec ±0.74% (96 runs sampled)
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trace-mapping: encoded originalPositionFor x 5,019,743 ops/sec ±0.74% (94 runs sampled)
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source-map-js: encoded originalPositionFor x 3,396,137 ops/sec ±42.32% (95 runs sampled)
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source-map-0.6.1: encoded originalPositionFor x 3,753,176 ops/sec ±0.72% (95 runs sampled)
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source-map-0.8.0: encoded originalPositionFor x 6,423,633 ops/sec ±0.74% (95 runs sampled)
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Fastest is trace-mapping: decoded originalPositionFor
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***
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preact.js.map
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trace-mapping: decoded JSON input x 3,499 ops/sec ±0.18% (98 runs sampled)
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trace-mapping: encoded JSON input x 6,078 ops/sec ±0.25% (99 runs sampled)
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trace-mapping: decoded Object input x 254,788 ops/sec ±0.13% (100 runs sampled)
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trace-mapping: encoded Object input x 14,063 ops/sec ±0.27% (94 runs sampled)
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source-map-js: encoded Object input x 2,465 ops/sec ±0.25% (98 runs sampled)
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source-map-0.6.1: encoded Object input x 1,174 ops/sec ±1.90% (95 runs sampled)
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Fastest is trace-mapping: decoded Object input
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trace-mapping: decoded originalPositionFor x 7,720,171 ops/sec ±0.14% (97 runs sampled)
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trace-mapping: encoded originalPositionFor x 6,864,485 ops/sec ±0.16% (101 runs sampled)
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source-map-js: encoded originalPositionFor x 2,387,219 ops/sec ±0.28% (98 runs sampled)
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source-map-0.6.1: encoded originalPositionFor x 1,565,339 ops/sec ±0.32% (101 runs sampled)
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source-map-0.8.0: encoded originalPositionFor x 3,819,732 ops/sec ±0.38% (98 runs sampled)
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Fastest is trace-mapping: decoded originalPositionFor
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***
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react.js.map
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trace-mapping: decoded JSON input x 1,719 ops/sec ±0.19% (99 runs sampled)
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trace-mapping: encoded JSON input x 4,284 ops/sec ±0.51% (99 runs sampled)
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trace-mapping: decoded Object input x 94,668 ops/sec ±0.08% (99 runs sampled)
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trace-mapping: encoded Object input x 5,287 ops/sec ±0.24% (99 runs sampled)
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source-map-js: encoded Object input x 814 ops/sec ±0.20% (98 runs sampled)
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source-map-0.6.1: encoded Object input x 429 ops/sec ±0.24% (94 runs sampled)
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Fastest is trace-mapping: decoded Object input
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trace-mapping: decoded originalPositionFor x 28,927,989 ops/sec ±0.61% (94 runs sampled)
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trace-mapping: encoded originalPositionFor x 27,394,475 ops/sec ±0.55% (97 runs sampled)
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source-map-js: encoded originalPositionFor x 16,856,730 ops/sec ±0.45% (96 runs sampled)
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source-map-0.6.1: encoded originalPositionFor x 12,258,950 ops/sec ±0.41% (97 runs sampled)
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source-map-0.8.0: encoded originalPositionFor x 22,272,990 ops/sec ±0.58% (95 runs sampled)
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Fastest is trace-mapping: decoded originalPositionFor
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```
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[source-map]: https://www.npmjs.com/package/source-map
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70
node_modules/@jridgewell/trace-mapping/package.json
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70
node_modules/@jridgewell/trace-mapping/package.json
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{
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"name": "@jridgewell/trace-mapping",
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"version": "0.3.9",
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"description": "Trace the original position through a source map",
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"keywords": [
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"source",
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"map"
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],
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"main": "dist/trace-mapping.umd.js",
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"module": "dist/trace-mapping.mjs",
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"typings": "dist/types/trace-mapping.d.ts",
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"files": [
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"dist"
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],
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"exports": {
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".": {
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"browser": "./dist/trace-mapping.umd.js",
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"require": "./dist/trace-mapping.umd.js",
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"import": "./dist/trace-mapping.mjs"
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},
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"./package.json": "./package.json"
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},
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"author": "Justin Ridgewell <justin@ridgewell.name>",
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"repository": {
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"type": "git",
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"url": "git+https://github.com/jridgewell/trace-mapping.git"
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},
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"license": "MIT",
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"scripts": {
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"benchmark": "run-s build:rollup benchmark:*",
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"benchmark:install": "cd benchmark && npm install",
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"benchmark:only": "node benchmark/index.mjs",
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"build": "run-s -n build:*",
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"build:rollup": "rollup -c rollup.config.js",
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"build:ts": "tsc --project tsconfig.build.json",
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"lint": "run-s -n lint:*",
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"lint:prettier": "npm run test:lint:prettier -- --write",
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"lint:ts": "npm run test:lint:ts -- --fix",
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"prebuild": "rm -rf dist",
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"prepublishOnly": "npm run preversion",
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"preversion": "run-s test build",
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"test": "run-s -n test:lint test:only",
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"test:debug": "ava debug",
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"test:lint": "run-s -n test:lint:*",
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"test:lint:prettier": "prettier --check '{src,test}/**/*.ts' '**/*.md'",
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"test:lint:ts": "eslint '{src,test}/**/*.ts'",
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"test:only": "c8 ava",
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"test:watch": "ava --watch"
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},
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"devDependencies": {
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"@rollup/plugin-typescript": "8.3.0",
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"@typescript-eslint/eslint-plugin": "5.10.0",
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"@typescript-eslint/parser": "5.10.0",
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"ava": "4.0.1",
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"benchmark": "2.1.4",
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"c8": "7.11.0",
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"esbuild": "0.14.14",
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"esbuild-node-loader": "0.6.4",
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"eslint": "8.7.0",
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"eslint-config-prettier": "8.3.0",
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"npm-run-all": "4.1.5",
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"prettier": "2.5.1",
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"rollup": "2.64.0",
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"typescript": "4.5.4"
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},
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"dependencies": {
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"@jridgewell/resolve-uri": "^3.0.3",
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"@jridgewell/sourcemap-codec": "^1.4.10"
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}
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}
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Reference in New Issue
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