Django urlconf 性能：嵌套模式组会有所帮助还是有害？

Question

我想知道使用多个嵌套模式组重组应用程序的 urlconf 是否会在 Django 查找请求匹配模式时提供性能提升。我不确定如何测试性能，但我已经尝试过，新版本至少可以工作。

我知道即使有性能提升，也可能微不足道。我开始这样做只是为了看看这些模式是否更容易被视为一棵树；我更担心把事情搞砸而不是提高速度。

以下是主 urlconf 包含的应用程序 urlconf /appname/.

旧的 urlconf:

from django.contrib.auth.decorators import login_required
from django.conf.urls.defaults import patterns, include, url
from django.views.generic.simple import redirect_to

from appname import views

urlpatterns = patterns('',
    # Actions on sets of reports
    url(r'^reports/page(?P<page>[0-9]+)/$', login_required(views.appnameListView.as_view())),
    url(r'^reports/bill/', views.bill),

    # Actions on individual reports
    url(r'^report/new/', views.new),
    url(r'^report/(?P<reportNumber>[^/]+)/$', views.detail),
    url(r'^report/(?P<reportNumber>[^/]+)/delete/$', views.delete),
    url(r'^report/(?P<reportNumber>[^/]+)/edit/$', views.edit),
    url(r'^report/(?P<reportNumber>[^/]+)/print/$', views.detail_print),
    # url(r'^report/(?P<reportNumber>[^/]+)/pdf/$', views.detail_pdf),

    # Configure app settings
    url(r'^config/$', views.configure),
    url(r'^config/reporttype/(?P<id>[^/]+)/$', views.configure_ReportType),
    url(r'^config/reporttype/(?P<id>[^/]+)/delete/$', views.configure_ReportType_delete),
    url(r'^config/avgmethod/(?P<name>[^/]+)/$', views.configure_AvgMethod),
    url(r'^config/avgmethod/(?P<name>[^/]+)/delete/$', views.configure_AvgMethod_delete),
    url(r'^config/datatransformer/(?P<name>[^/]+)/$', views.configure_DataTransformer),
    url(r'^config/datatransformer/(?P<name>[^/]+)/delete/$', views.configure_DataTransformer_delete),

    # Catch all; #TODO: 404
    url(r'^', redirect_to, {'url': '/appname/reports/page1/'}),
)

新的网址配置：

from django.contrib.auth.decorators import login_required
from django.conf.urls.defaults import patterns, include, url
from django.views.generic.simple import redirect_to

from appname import views

urlpatterns = patterns('',
    # Actions on sets of reports
    url(r'^reports/', include(patterns('',
        url(r'^page(?P<page>[0-9]+)/$', login_required(views.appnameListView.as_view())),
        url(r'^bill/', views.bill),
    ))),

    # Actions on individual reports
    url(r'^report/', include(patterns('',
        url(r'^new/', views.new),
        url(r'^(?P<reportNumber>[^/]+)/$', views.detail),
        url(r'^(?P<reportNumber>[^/]+)/delete/$', views.delete),
        url(r'^(?P<reportNumber>[^/]+)/edit/$', views.edit),
        url(r'^(?P<reportNumber>[^/]+)/print/$', views.detail_print),
        # url(r'^(?P<reportNumber>[^/]+)/pdf/$', views.detail_pdf),
    ))),

    # Configure app settings
    url(r'^config/', include(patterns('',
        url(r'^$', views.configure),
        url(r'^reporttype/(?P<id>[^/]+)/$', views.configure_ReportType),
        url(r'^reporttype/(?P<id>[^/]+)/delete/$', views.configure_ReportType_delete),
        url(r'^avgmethod/(?P<name>[^/]+)/$', views.configure_AvgMethod),
        url(r'^avgmethod/(?P<name>[^/]+)/delete/$', views.configure_AvgMethod_delete),
        url(r'^datatransformer/(?P<name>[^/]+)/$', views.configure_DataTransformer),
        url(r'^datatransformer/(?P<name>[^/]+)/delete/$', views.configure_DataTransformer_delete),
    ))),

    # Catch all; #TODO: 404
    url(r'^', redirect_to, {'url': '/appname/reports/page1/'}),
)

我可以更进一步（使用正则表达式检查的 5 个变量中的 4 个至少定义了两次），但我担心失去可读性的原始好处。

Answer 1

如果你 不想重蹈覆辙 遵循 DRY 原则（在开发 django 代码时有时会大量采用该原则），您应该对 url 进行分组。因此，您将减少重复代码的数量并生成更易于维护的代码。例如，考虑一下这样一个事实，稍后您可能想要将报告/网址更改为其他内容，那么您必须对每个网址执行此操作！