1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
const path = require("path");
const fs = require("fs");
const BinaryMiddleware = require("../lib/serialization/BinaryMiddleware");
const FileMiddleware = require("../lib/serialization/FileMiddleware");
const Serializer = require("../lib/serialization/Serializer");
const SerializerMiddleware = require("../lib/serialization/SerializerMiddleware");
/** @typedef {{ size: number, lazySize: number }} SizeInfo */
const binaryMiddleware = new BinaryMiddleware();
const serializer = new Serializer([binaryMiddleware, new FileMiddleware(fs)]);
const rawSerializer = new Serializer([new FileMiddleware(fs)]);
/** @type {Array<SizeInfo | undefined>} */
const lazySizes = [];
/**
* @param {Array<any>} data data
* @returns {Promise<SizeInfo>} size info
*/
const captureSize = async data => {
let size = 0;
let lazySize = 0;
for (const b of data) {
if (Buffer.isBuffer(b)) {
size += b.length;
} else if (typeof b === "function") {
const i = lazySizes.length;
lazySizes.push(undefined);
const r = await captureSize(await b());
lazySize += r.size + r.lazySize;
lazySizes[i] = r;
}
}
return { size, lazySize };
};
const ESCAPE = null;
const ESCAPE_ESCAPE_VALUE = null;
const ESCAPE_END_OBJECT = true;
const ESCAPE_UNDEFINED = false;
/**
* @param {Array<any>} data data
* @param {string} indent indent
* @returns {Promise<void>} promise
*/
const printData = async (data, indent) => {
if (!Array.isArray(data)) throw new Error("Not an array");
if (Buffer.isBuffer(data[0])) {
for (const b of data) {
if (typeof b === "function") {
const innerData = await b();
const info = /** @type {SizeInfo} */ (lazySizes.shift());
const sizeInfo = `${(info.size / 1048576).toFixed(2)} MiB + ${(
info.lazySize / 1048576
).toFixed(2)} lazy MiB`;
console.log(`${indent}= lazy ${sizeInfo} {`);
await printData(innerData, `${indent} `);
console.log(`${indent}}`);
} else {
console.log(`${indent}= ${b.toString("hex")}`);
}
}
return;
}
const referencedValues = new Map();
const referencedValuesCounters = new Map();
const referencedTypes = new Map();
let currentReference = 0;
let currentTypeReference = 0;
let i = 0;
const read = () => data[i++];
/**
* @param {string} content content
*/
const printLine = content => {
console.log(`${indent}${content}`);
};
printLine(`Version: ${read()}`);
while (i < data.length) {
const item = read();
if (item === ESCAPE) {
const nextItem = read();
if (nextItem === ESCAPE_ESCAPE_VALUE) {
printLine("null");
} else if (nextItem === ESCAPE_UNDEFINED) {
printLine("undefined");
} else if (nextItem === ESCAPE_END_OBJECT) {
indent = indent.slice(0, -2);
printLine(`} = #${currentReference++}`);
} else if (typeof nextItem === "number" && nextItem < 0) {
const ref = currentReference + nextItem;
const value = referencedValues.get(ref);
referencedValuesCounters.set(
ref,
(referencedValuesCounters.get(ref) || 0) + 1
);
if (value) {
printLine(
`Reference ${nextItem} => ${JSON.stringify(value)} #${ref}`
);
} else {
printLine(`Reference ${nextItem} => #${ref}`);
}
} else {
const request = nextItem;
if (typeof request === "number") {
const ref = currentTypeReference - request;
printLine(
`Object (Reference ${request} => ${referencedTypes.get(
ref
)} @${ref}) {`
);
} else {
const name = read();
referencedTypes.set(currentTypeReference, `${request} / ${name}`);
printLine(
`Object (${request} / ${name} @${currentTypeReference++}) {`
);
}
indent += " ";
}
} else if (typeof item === "string") {
if (item !== "") {
referencedValues.set(currentReference, item);
printLine(`${JSON.stringify(item)} = #${currentReference++}`);
} else {
printLine('""');
}
} else if (Buffer.isBuffer(item)) {
printLine(`buffer ${item.toString("hex")} = #${currentReference++}`);
} else if (typeof item === "function") {
const innerData = await item();
if (!SerializerMiddleware.isLazy(item, binaryMiddleware)) {
const info = /** @type {SizeInfo} */ (lazySizes.shift());
const sizeInfo = `${(info.size / 1048576).toFixed(2)} MiB + ${(
info.lazySize / 1048576
).toFixed(2)} lazy MiB`;
printLine(`lazy-file ${sizeInfo} {`);
} else {
printLine("lazy-inline {");
}
await printData(innerData, `${indent} `);
printLine("}");
} else {
printLine(String(item));
}
}
const refCounters = Array.from(referencedValuesCounters);
refCounters.sort(([a, A], [b, B]) => B - A);
printLine("SUMMARY: top references:");
for (const [ref, count] of refCounters.slice(10)) {
const value = referencedValues.get(ref);
if (value) {
printLine(`- #${ref} x ${count} = ${JSON.stringify(value)}`);
} else {
printLine(`- #${ref} x ${count}`);
}
}
};
const filename = process.argv[2];
(async () => {
const structure = await rawSerializer.deserialize(null, {
filename: path.resolve(filename),
extension: ".pack"
});
const info = await captureSize(structure);
const sizeInfo = `${(info.size / 1048576).toFixed(2)} MiB + ${(
info.lazySize / 1048576
).toFixed(2)} lazy MiB`;
console.log(`${filename} ${sizeInfo}:`);
const data = await serializer.deserialize(null, {
filename: path.resolve(filename),
extension: ".pack"
});
await printData(data, "");
})();
|
