phantom-pool
Resource pool based on generic-pool for PhantomJS.
Creating new phantom instances with phantom.create()
can be slow. If
you are frequently creating new instances and destroying them, as a
result of HTTP requests for example, this module can help by keeping a
pool of phantom instances alive and making it easy to re-use them across
requests.
Here's an artificial benchmark to illustrate:
Starting benchmark without pool
noPool-0: 786.829ms
noPool-1: 790.822ms
noPool-2: 795.150ms
noPool-3: 788.928ms
noPool-4: 793.788ms
noPool-5: 798.075ms
noPool-6: 813.130ms
noPool-7: 803.801ms
noPool-8: 782.936ms
noPool-9: 805.630ms
Starting benchmark with pool
pool-0: 48.160ms
pool-1: 98.966ms
pool-2: 89.573ms
pool-3: 99.057ms
pool-4: 101.970ms
pool-5: 102.967ms
pool-6: 102.938ms
pool-7: 99.359ms
pool-8: 101.972ms
pool-9: 103.309ms
Done
Using pool in this benchmark results in an average >8x speed increase.
Install
npm install --save phantom-pool
Requires Node v6+
Usage
See ./test directory for usage examples.
const createPhantomPool = // Returns a generic-pool instanceconst pool = // Automatically acquires a phantom instance and releases it back to the// pool when the function resolves or throwspool // Destroying the pool:pool // For more API doc, see https://github.com/coopernurse/node-pool#generic-pool
Security
When using phantom-pool, you should be aware that the phantom instance you are getting might not be in a completely clean state. It could have browser history, cookies or other persistent data from a previous use.
If that is an issue for you, make sure you clean up any sensitive data on the phantom instance before returning it to the pool.