Have option to disable host variables

[PeteDuncanson]

Found that if you use the V8Runtime.CreateScriptEngine method for spinning up a new engine context you can pass in options to disable allowing calls out to the .net host environment or variables. This should give a "significant" performance boost apparently. Might help with #3

See Microsoft.ClearScript.V8.V8ScriptEngineFlags Enumeration

Option DisableGlobalMembers - Specifies that support for GlobalMembers behavior is to be disabled. This option yields a significant performance benefit for global item access.

For reference GlobalMembers - Defines options for exposing host resources to script code.

[Daniel15]

Looks like JavaScriptEngineSwitcher added support for DisableGlobalMembers in version 1.2.3: https://github.com/Taritsyn/JavaScriptEngineSwitcher/blob/master/CHANGELOG.md

You may even be able to just set this in your Web.config or App.config file, if JavaScriptEngineSwitcher has implemented that.

[Daniel15]

Upgraded JavaScriptEngineSwitcher to the latest version in fd946d9. This update allows you to set this flag in your Web.config or App.config:

<configuration>
    ...
    <jsEngineSwitcher xmlns="http://tempuri.org/JavaScriptEngineSwitcher.Configuration.xsd">
        ...
        <v8 disableGlobalMembers="true" />
    </jsEngineSwitcher>