使用forkJoin进行多个http请求的Angular 10速度较慢

如何解决使用forkJoin进行多个http请求的Angular 10速度较慢

在Angular中使用Combinedobservables是我的新手。我有以下代码片段。使用forkJoin的多个http请求似乎要花费将近15秒。

不确定如何调试此性能问题。

有人可以帮我解决我在这里做错的事情吗，还是有更好的方法来更快地做出反应？

    forkJoin(this.layersArray
        .map((layer: any) => this.service.getLayerTreatyNumber(layer.layerId)))
        .subscribe((treatyNumbers: SelectItem[][]) => {
            treatyNumbers.forEach((treatyNumberOptions: StructuringLayerTreatyData[],index: number) => {
                const layer: StructuringLayerOverviewData = this.structuringOverviewStateService.initialData.layers[index];
                layer.treatyNumberOptions = treatyNumberOptions;
                const matchingOption: StructuringLayerTreatyData = treatyNumberOptions.find(t => t.name === layer.treatyNumber);
                if (matchingOption) {
                    layer.selectedTreatyNumber = matchingOption;
                    layer.businessUnit = matchingOption.businessUnit;
                } else {
                    layer.treatyNumber = '';
                    layer.businessUnit = '';
                    this.service.saveLayers(); //This takes the layers[] and saves.
                }
            });
            this.isFirstLoad = false;
        });

谢谢