ladybird/Libraries/LibJS/Position.h

/*
 * Copyright (c) 2023, Andreas Kling <andreas@ladybird.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

namespace JS {

struct Position {
    size_t line { 0 };
    size_t column { 0 };
    size_t offset { 0 };
};

}
LibJS: Make line-and-column resolution fast for large minified JS Instead of caching start-of-line offsets, we now cache byte offsets at regular intervals. This fixes an issue where we had terrible performance on large minified JS, since that often means one very, VERY long line (with no line endings to cache). My machine was spending ~35ms per stack frame when throwing errors on some heavy minified websites, and after this patch, we now spend <1ms per stack frame. 2023-09-12 11:03:56 +00:00			`/*`
Meta: Update my e-mail address everywhere 2024-10-04 11:19:50 +00:00			`* Copyright (c) 2023, Andreas Kling <andreas@ladybird.org>`
LibJS: Make line-and-column resolution fast for large minified JS Instead of caching start-of-line offsets, we now cache byte offsets at regular intervals. This fixes an issue where we had terrible performance on large minified JS, since that often means one very, VERY long line (with no line endings to cache). My machine was spending ~35ms per stack frame when throwing errors on some heavy minified websites, and after this patch, we now spend <1ms per stack frame. 2023-09-12 11:03:56 +00:00			`*`
			`* SPDX-License-Identifier: BSD-2-Clause`
			`*/`

			`#pragma once`

			`namespace JS {`

			`struct Position {`
			`size_t line { 0 };`
			`size_t column { 0 };`
			`size_t offset { 0 };`
			`};`

			`}`