BruceChen7

参考资料

命令

cat /proc/cpuinfo

[root@zorrozou-pc	~/test]#	cat	/proc/cpuinfo
processor				:	23
vendor_id				:	GenuineIntel
cpu	family				:	6
model					:	63
model	name			:	Intel(R)	Xeon(R)	CPU	E5-2620	v3	@	2.40GHz

BruceChen7

// 固定数组，类型体操
// [Zig lang 初体验 -- 『大道至简』的 comptime - 纯纯的 Blog](https://blog.zhuangty.com/zig-lang-comptime/)
const std = @import("std");
const ArrayList = std.ArrayList;
const DynamicBitSet = std.bit_set.DynamicBitSet;

fn FixedArray(comptime T: type) type {
    return struct {
        const Self = @This();
        data: ArrayList(T),

BruceChen7

#!/bin/bash

errors=0
for file in $(git diff --cached --name-only | grep "\.go"); do
  diff="$(gofmt -d "${file}")"
  if [[ -n "$diff" ]]; then
    echo "# *** ERROR: *** File ${file} has not been gofmt'd." >> $1
    errors=1
  fi
done

BruceChen7

资料来源

• How We Design Our APIs at Slack - Slack Engineering

考虑的事情

• 做一件事情，并把它做好
• Make it fast and easy to get started
• 努力实现直觉上的一致性
  • 反映在你的URL，输入和输出响应中。开发人员应该能够猜到你的API的部分内容，即使不看文档。
  • 与工业标准的一致性。它应该尽可能地遵守行业中公认的最佳实践。
• 与你的产品保持一致。你应该根据你在产品中对这些概念的称呼来选择字段名。避免使用缩写、首字母缩写和行话。要啰嗦。

BruceChen7

// 创建bridge
create_bridge() {
    local nsname="$1"
    local ifname="$2"

    echo "Creating bridge ${nsname}/${ifname}"

    ip netns add ${nsname}
    ip netns exec ${nsname} ip link set lo up
    ip netns exec ${nsname} ip link add ${ifname} type bridge

BruceChen7

// [Go语言高性能编程手册（万字长文）](https://mp.weixin.qq.com/s/iSxWFsnNLGgilzKIsSDBgg)
// Bad
for i := 0; i < b.N; i++ {
 s := fmt.Sprint(rand.Int())
}

BenchmarkFmtSprint-4    143 ns/op    2 allocs/op

// Good
for i := 0; i < b.N; i++ {

BruceChen7

// 在64机器上，返回16字节
// 存在 pading
// http://www.catb.org/esr/structure-packing/
struct foo3 {
    char *p;     /* 8 bytes */
    char c;      /* 1 byte */
};

struct foo3 singleton;
struct foo3 quad[4];

BruceChen7

// 传统oop的方式
// [jamesmcm/data-oriented-example: Example of Data Oriented Design in Rust](https://github.com/jamesmcm/data-oriented-example)
// https://jamesmcm.github.io/blog/2020/07/25/intro-dod/
pub struct Player {
    name: String,
    health: f64,
    location: (f64, f64),
    velocity: (f64, f64),
    acceleration: (f64, f64),
}

BruceChen7

// bpf_map的属性
union bpf_attr {
 struct {
 __u32 map_type; /* one of the values from bpf_map_type */
 __u32 key_size; /* size of the keys, in bytes */
 __u32 value_size; /* size of the values, in bytes */
 __u32 max_entries; /* maximum number of entries in the map */
 __u32 map_flags; /* flags to modify how we create the map */
 };
}

BruceChen7

//go:build go1.12
// +build go1.12
// goversion.go

// Package goversion enforces the go version supported by the tsdb module.
package goversion

const _SoftwareRequiresGOVERSION1_12 = uint8(0)