agreatfool

syntax = "proto3";

package com.book;

message Book {
    int64 isbn = 1;
    string title = 2;
    string author = 3;
}

agreatfool

  --log_gc (Log heap samples on garbage collection for the hp2ps tool.)
        type: bool  default: false
  --expose_gc (expose gc extension)
        type: bool  default: false
  --max_new_space_size (max size of the new generation (in kBytes))
        type: int  default: 0
  --max_old_space_size (max size of the old generation (in Mbytes))
        type: int  default: 0
  --max_executable_size (max size of executable memory (in Mbytes))
        type: int  default: 0

agreatfool

$ node -v
v8.4.0
$ node --v8-options | grep gc
  --gc_global (always perform global GCs)
  --gc_interval (garbage collect after <n> allocations)
  --retain_maps_for_n_gc (keeps maps alive for <n> old space garbage collections)
  --trace_gc (print one trace line following each garbage collection)
  --trace_gc_nvp (print one detailed trace line in name=value format after each garbage collection)
  --trace_gc_ignore_scavenger (do not print trace line after scavenger collection)
  --trace_gc_verbose (print more details following each garbage collection)

agreatfool

package main

import (
	"fmt"
	"math/rand"
	"net/http"
	_ "net/http/pprof"
	"runtime"
	"time"
)

agreatfool

package main

import (
	"flag"
	"fmt"
	"math/rand"
	"net/http"
	_ "net/http/pprof"
	"os"
	"runtime"

agreatfool

#!/usr/bin/env node
"use strict";

const interval = 1000; // 采样间隔，即在这个间隔的自然时间内，调用lag()得到的结果将只会得到同样的返回
const lag = require('event-loop-lag')(interval);

function consume() {
  function fabonacci(n) {
    if (n === 0) {
      return 0;

agreatfool

import { Entity, Column, PrimaryGeneratedColumn, Index, BaseEntity } from 'typeorm';

@Entity('test_entity')
@Index('test_entity_index', ['columnB', 'columnC'], { unique: true })
export class TestEntity extends BaseEntity {
  @PrimaryGeneratedColumn({ type: 'int', name: 'id' })
  id: number;

  @Column({ type: 'int', name: 'column_b' })
  columnB: number;

agreatfool

Statistical profiling result from isolate-0x103000000-v8.log, (20819 ticks, 582 unaccounted, 0 excluded).

 [Shared libraries]:
   ticks  total  nonlib   name
     38    0.2%          /usr/lib/system/libsystem_malloc.dylib
     22    0.1%          /usr/lib/system/libsystem_kernel.dylib
      9    0.0%          /usr/lib/system/libsystem_platform.dylib
      4    0.0%          /usr/lib/system/libsystem_c.dylib
      1    0.0%          /usr/lib/system/libsystem_pthread.dylib

agreatfool

{
  "name": "profile",
  "version": "0.0.1",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "MIT",

agreatfool

{
  "swagger": "2.0",
  "info": {
    "title": "book/book.proto",
    "version": "version not set"
  },
  "schemes": [
    "http",
    "https"
  ],