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Reimplement micromark helper filterByPredicate to do fewer array manipulations for a ~6-7% elapsed time reduction.

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David Anson 2023-09-02 21:30:43 -07:00
parent 24c97a54fb
commit 6a2b86753b
2 changed files with 49 additions and 18 deletions
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32
demo/markdownlint-browser.js
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@ -1320,15 +1320,29 @@ function micromarkParse(markdown) {
*/
function filterByPredicate(tokens, allowed, transformChildren) {
var result = [];
var pending = _toConsumableArray(tokens);
var token = null;
while (token = pending.shift()) {
if (allowed(token)) {
result.push(token);
}
if (token.children.length > 0) {
var transformed = transformChildren ? transformChildren(token) : token.children;
pending.unshift.apply(pending, _toConsumableArray(transformed));
var queue = [{
"array": tokens,
"index": 0
}];
while (queue.length > 0) {
var current = queue[queue.length - 1];
var array = current.array,
index = current.index;
if (index < array.length) {
var token = array[current.index++];
if (allowed(token)) {
result.push(token);
}
var children = token.children;
if (children.length > 0) {
var transformed = transformChildren ? transformChildren(token) : children;
queue.push({
"array": transformed,
"index": 0
});
}
} else {
queue.pop();
}
}
return result;