Question

我在节点服务器中处理了以下HTTP请求。我必须发回一个磁盘列表作为回复。

代码是：

DiskPromise.getDiskCount(client).then(function (diskCount) {
    DiskPromise.getDisks(client, diskCount).then(function (disks) {
        RaidPromise.getRaidCount(client).then(function (raidCount) {
            RaidPromise.getRaidArrays(client, raidCount).then(function (raidArrays) {
                for (i in disks) {
                    disks[i].setRaidInfo(raidArrays);
                }
                RaidPromise.getGlobalSpareList(client).then (function(spareNames) {
                    for (i in disks) {
                        disks[i].setSpareNess(spareNames);
                    }
                    res.json(disks);
                }, function (err) {
                    console.log("something (either getDiskCount, or one of the getDisk calls) blew up", err);
                    res.send(403, { error: err.toString() });

                });
            });
        });
    });
});

承诺是SOAP调用。客户端需要4.5到7.0秒的时间才能获得响应。

我是否在做一些结构错误的布局代码？

Answer 1

分析代码意味着获取磁盘，raidArrays和备用名称的平凡并行化机会。性能大大提高

var disks = DiskPromise.getDiskCount(client).then(function (diskCount) {
    return DiskPromise.getDisks(client, diskCount);
});
var raidArrays = RaidPromise.getRaidCount(client).then(function (raidCount) {
    return RaidPromise.getRaidArrays(client, raidCount);
});
var spareNames = RaidPromise.getGlobalSpareList(client);

Promise.all([disks, raidArays, spareNames]).spread(function(disks, raidArrays, spareNames) {
    for(var i in disks) {
        disks[i].setRaidInfo(raidArrays);
        disks[i].setSpareNess(spareNames);
    }
    res.json(disks);
}).catch(function(err) {
    console.log("something (either getDiskCount, or one of the getDisk calls) blew up", err);
    res.send(403, { error: err.toString() });
});

我怎样才能加快这一系列的承诺？

1 个答案: