@DanielSan6998 wrote:
Hi guys, I'm migrating REST API calls to RESTCONF calls, but RESTCONF is underperforming at any request.
First of all, happy to see that you are migrating from REST API to RESTCONF!
For example:
http://127.0.0.1:8080/restconf/data/devices/device=OriHuaDemo
response time is 22 seconds
But the same query with REST API:
http://127.0.0.1:8080/api/operational/devices/device/OriHuaDemo
response time is 6 seconds
Do you have any clue why this is happening? it's a normal behavior?
I tried also CLI and JSONRPC, both faster, this performance issue seems to be RESTCONF specific.
TL;DR It is probably not the same thing that is compared. RESTCONF is somewhat
faster for comparable payloads in benchmarks.
A normal GET request to RESTCONF is similar to using query parameters "verbose"
and "deep" for REST API. Otherwise the result payload will be very different, similar
in size order as the time difference presented.
On a new installation of NSO I performed these queries
REST API
$ time curl -isu admin:admin localhost:8080/api/operational?verbose\&deep | wc -l
3547
real 0m0.235s
user 0m0.015s
sys 0m0.034
Not using the "verbose" and "deep" query parameters will yield about half the
lines of payload, and hence be faster.
Analog for RESTCONF
$ time curl -isu admin:admin localhost:8080/restconf/data | wc -l
3515
real 0m0.189s
user 0m0.014s
sys 0m0.004s
The tests have been run a number of times and consistently shows similar
results on my machine.
Example towards ncs-state where similar differences shows
$ time curl -isu admin:admin localhost:8080/api/operational/ncs-state | wc -l
379
real 0m0.024s
user 0m0.007s
sys 0m0.010s
$ time curl -isu admin:admin localhost:8080/api/operational/ncs-state?verbose\&deep | wc -l
956
real 0m0.065s
user 0m0.022s
sys 0m0.000s
$ time curl -isu admin:admin localhost:8080/restconf/data/tailf-ncs-monitoring:ncs-state | wc -l
955
real 0m0.058s
user 0m0.000s
sys 0m0.016s
The results show that RESTCONF is somewhat faster on comparable payloads.
There are still some things that can be done to tweak RESTCONF performance
of course, which we are discussing.
It would be interesting to see benchmarks comparing REST API, RESTCONF,
CLI, and JSON-RPC, please send us your findings!
