异常堆栈优化

[kookxiang]

Checklist

• [x] npm test passes
• [ ] tests and/or benchmarks are included
• [ ] documentation is changed or added
• [x] commit message follows commit guidelines

Affected core subsystem(s)

Description of change

使用 setTimeout 和 setInterval 现有调用堆栈中看不到调用来源，无法排查原因 移到外面使 err 有完整堆栈信息

[fengmk2]

可以给个前后效果对比？

唯一的疑惑是每次都 new Error，性能会增加多少开销？

[kookxiang]

修改前

[pid: 36908][APIClient] ResponseTimeoutError: Server no response in 10000ms, address#xxxxxx (address: xxxxxx) 
Error Stack:
  ResponseTimeoutError: Server no response in 10000ms, address#xxxxxx (address: xxxxxx)
    at Timeout._invokes.set.timer.setTimeout [as _onTimeout] (.../node_modules/tcp-base/lib/base.js:225:21)
    at ontimeout (timers.js:498:11)
    at tryOnTimeout (timers.js:323:5)
    at Timer.listOnTimeout (timers.js:290:5)

修改后

[Wed Aug 28 2019 14:50:45 GMT+0800 (CST)][pid: 38569][APIClient] ResponseTimeoutError: Server no response in 10000ms, address#xxxxxx (address: xxxxxx) 
Error Stack:
  ResponseTimeoutError: Server no response in 10000ms, address#xxxxxx (address: xxxxxx)
    at Connection.send (.../node_modules/tcp-base/lib/base.js:218:17)
    at Connection.sendRequest (.../node_modules/xxxxxx/lib/connection.js:100:11)
    at Connection.sendHeartBeat (.../node_modules/xxxxxx/lib/connection.js:142:10)
    at Timeout._heartbeatTimer.setInterval [as _onTimeout] (.../node_modules/tcp-base/lib/base.js:442:12)
    at ontimeout (timers.js:498:11)
    at tryOnTimeout (timers.js:323:5)
    at Timer.listOnTimeout (timers.js:290:5)

至少可以缩小异常来源的范围到某个包了

new Error 本身开销测了下和 setTimeout 也差不多，加了以后整个包的性能还没想好怎么测