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perf(parser): optimize v8 perf deoptimizations (#61)

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This commit is contained in:
Nikolay Kostyurin
2020-04-05 15:08:59 +02:00
committed by GitHub
parent e3727dc5f5
commit 97ecba0af6
3 changed files with 93 additions and 14 deletions
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packages/bbob-parser/src/Token.js
+60 -9
View File
@@ -17,19 +17,70 @@ const TOKEN_TYPE_ATTR_VALUE = 'attr-value';
const TOKEN_TYPE_SPACE = 'space';
const TOKEN_TYPE_NEW_LINE = 'new-line';
const getTokenValue = (token) => token[TOKEN_VALUE_ID];
const getTokenLine = (token) => token[TOKEN_LINE_ID];
const getTokenColumn = (token) => token[TOKEN_COLUMN_ID];
/**
* @param {Token} token
* @returns {string}
*/
const getTokenValue = (token) => {
if (token && typeof token[TOKEN_VALUE_ID] !== 'undefined') {
return token[TOKEN_VALUE_ID];
}
const isTextToken = (token) => token[TOKEN_TYPE_ID] === TOKEN_TYPE_SPACE
|| token[TOKEN_TYPE_ID] === TOKEN_TYPE_NEW_LINE
|| token[TOKEN_TYPE_ID] === TOKEN_TYPE_WORD;
return '';
};
/**
* @param {Token}token
* @returns {number}
*/
const getTokenLine = (token) => (token && token[TOKEN_LINE_ID]) || 0;
const getTokenColumn = (token) => (token && token[TOKEN_COLUMN_ID]) || 0;
const isTagToken = (token) => token[TOKEN_TYPE_ID] === TOKEN_TYPE_TAG;
/**
* @param {Token} token
* @returns {boolean}
*/
const isTextToken = (token) => {
if (token && typeof token[TOKEN_TYPE_ID] !== 'undefined') {
return token[TOKEN_TYPE_ID] === TOKEN_TYPE_SPACE
|| token[TOKEN_TYPE_ID] === TOKEN_TYPE_NEW_LINE
|| token[TOKEN_TYPE_ID] === TOKEN_TYPE_WORD;
}
return false;
};
/**
* @param {Token} token
* @returns {boolean}
*/
const isTagToken = (token) => {
if (token && typeof token[TOKEN_TYPE_ID] !== 'undefined') {
return token[TOKEN_TYPE_ID] === TOKEN_TYPE_TAG;
}
return false;
};
const isTagEnd = (token) => getTokenValue(token).charCodeAt(0) === SLASH.charCodeAt(0);
const isTagStart = (token) => !isTagEnd(token);
const isAttrNameToken = (token) => token[TOKEN_TYPE_ID] === TOKEN_TYPE_ATTR_NAME;
const isAttrValueToken = (token) => token[TOKEN_TYPE_ID] === TOKEN_TYPE_ATTR_VALUE;
const isAttrNameToken = (token) => {
if (token && typeof token[TOKEN_TYPE_ID] !== 'undefined') {
return token[TOKEN_TYPE_ID] === TOKEN_TYPE_ATTR_NAME;
}
return false;
};
/**
* @param {Token} token
* @returns {boolean}
*/
const isAttrValueToken = (token) => {
if (token && typeof token[TOKEN_TYPE_ID] !== 'undefined') {
return token[TOKEN_TYPE_ID] === TOKEN_TYPE_ATTR_VALUE;
}
return false;
};
const getTagName = (token) => {
const value = getTokenValue(token);
packages/bbob-parser/src/parse.js
+10 -2
View File
@@ -77,7 +77,11 @@ const parse = (input, opts = {}) => {
const getNodes = () => {
const lastNestedNode = nestedNodes.getLast();
return lastNestedNode ? lastNestedNode.content : nodes.toArray();
if (lastNestedNode && Array.isArray(lastNestedNode.content)) {
return lastNestedNode.content;
}
return nodes.toArray();
};
/**
@@ -85,7 +89,11 @@ const parse = (input, opts = {}) => {
* @param {TagNode} tag
*/
const appendNodes = (tag) => {
getNodes().push(tag);
const items = getNodes();
if (Array.isArray(items)) {
items.push(tag);
}
};
/**
packages/bbob-parser/src/utils.js
+23 -3
View File
@@ -57,8 +57,22 @@ export const createCharGrabber = (source, options) => {
return source.substr(start, cursor.pos - start);
},
getNext: () => source[cursor.pos + 1],
getPrev: () => source[cursor.pos - 1],
getNext: () => {
const nextPos = cursor.pos + 1;
if (nextPos <= (source.length - 1)) {
return source[nextPos];
}
return null;
},
getPrev: () => {
const prevPos = cursor.pos - 1;
if (typeof source[prevPos] !== 'undefined') {
return source[prevPos];
}
return null;
},
getCurr,
getRest,
/**
@@ -127,7 +141,13 @@ export const createList = (values = []) => {
/**
* @callback getLastCb
*/
const getLast = () => (nodes.length ? nodes[nodes.length - 1] : null);
const getLast = () => {
if (Array.isArray(nodes) && nodes.length > 0 && typeof nodes[nodes.length - 1] !== 'undefined') {
return nodes[nodes.length - 1];
}
return null;
};
/**
* @callback flushLastCb
* @return {*}