Abstract:
Techniques are described for promoting content items in a page to load in a different order than the order in which they were initially designated to load in the page source. A page may include critical content items designated to load earlier than non-critical content items. In instances where there is a delay due to latency in generating or retrieving the critical content items, one or more non-critical content items may be promoted to load earlier than initially designated. By promoting non-critical content items to load during the period in which the loading of the page may otherwise be stalled, overall page load times may be reduced.
Abstract:
Disclosed are various embodiments for hierarchical modeling of network sites. A page model from a hierarchy of page models is provided in at least one computing device. The page model includes a plurality of features. Each one of the features is assigned to a respective network page region. The features include at least one original feature and at least one inheritable feature from a parent page model. A network page is generated in the at least one computing device corresponding to the page model. Each one of the features of the page model is encoded for rendering within the respective network page region.
Abstract:
Disclosed are various embodiments for securing execution of page generation code supplied by customers. The page generation code may be instrumented with code that facilitates monitoring of one or more resources consumed by the page generation code. Various compile-time checks relating, for example, to code size and whether exception-handling code is present may be performed. The page generation code is executed to generate a network page in response to a request obtained from a client. One or more resource consumption limits are enforced upon the page generation code.
Abstract:
Disclosed are various embodiments for hierarchical modeling of network sites. A page model from a hierarchy of page models is provided in at least one computing device. The page model includes a plurality of features. Each one of the features is assigned to a respective network page region. The features include at least one original feature and at least one inheritable feature from a parent page model. A network page is generated in the at least one computing device corresponding to the page model. Each one of the features of the page model is encoded for rendering within the respective network page region.
Abstract:
Techniques are described for delivering one or more first resources of a page using a first security level, and delivering one or more second resources of a page using a second, different security level. A page is generated to include elements identifying resources to be presented in the page, and the elements may include security level identifiers indicating a security level to be employed in communicating the corresponding resource. Each security level may be associated with a set of security measures that ensure the integrity or confidentiality of the resource while it is communicated. The use of multiple security levels to communicate multiple resources may provide appropriate security for each resource, reducing latency and overhead in page generation, communication, and rendering.
Abstract:
A computing device can obtain a session key for encrypting data that is communicated between a client device and the computing device. The computing device can receive, from the client device, an encrypted request for data. The encrypted request can be encrypted by the client device using the session key. The data requested can be stored on a second computing device. The computing device can send, to the second computing device, a copy of the session key and the encrypted request for data. The second computing device can decrypt the data using the session key and can also encrypt data responsive to the request using the session key.
Abstract:
Program code, such the program code of an application program, can be modified to permit the program code to execute in a multi-tenant execution environment. For example, program code might be modified at compile time, run time, or at another time, in order to enable the program code to properly operate in an execution environment in which applications might be simultaneously executed in process by multiple tenants. Program code might also be modified at run time to enable the program code to execute in a distributed fashion in a distributed computing environment. For example, portions of the program code might be configured at run time to execute in different instances of an execution environment. The program code might be modified at run time to enable the program code to properly execute in multiple instances of the execution environment.
Abstract:
Methods and systems for avoiding or deferring data copies are disclosed. Using a virtual machine, it is determined whether a set of program code comprises references to a data object after an operation to generate a copy of the data object. If not, a set of optimized program code is generated in which the operation to copy the data object is replaced with an operation to update a reference. Using the virtual machine, it is determined whether the set of program code comprises an operation to generate a copy of a buffer object. If so, a set of further optimized program code is generated, comprising an allocation of one or more memory pages to store the buffer object with a copy-on-write parameter instead of the operation to generate the copy of the buffer object.
Abstract:
Disclosed are various embodiments for speculatively generating network page components to reduce network page generation latency. A request for a network page is received. Speculative generation is initiated for multiple network page components that are capable of being included in the network page. A subset of the speculatively generated network page components that will actually be included in the network page is determined. The network page is then generated, where the subset of the speculatively generated network page components are included in the network page and others of the speculatively generated network page components are excluded from the network page.
Abstract:
Extensible change control management for development and deployment of applications is described. A change control manager may register plugin components, including requester, approver and performer components, to process changes to a resource of a resource type, where registering is performed responsive to request(s) received via programmatic interface(s). Upon receiving a change request from the requester component, the change control manager may send the change request to the approver component to approve the change request and, responsive to notification of approval from the approver component, the change control manager may then send the change request to the performer component to implement the requested change. The change control manager and the various components each send and/or receive change requests encoded in a standardized schema for the resource type, the standardized schema independent of the implementation of the resource and the means of implementing changes to the resource by the performer component.