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CPS Core Performance
Test Environment
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| Hardware | Specifications |
|---|---|
| CPU | 13th Gen Intel© Core™ i9-13900H (24 MB cache, 14 cores, up to 5.40 GHz turbo mode) |
| Memory | 32 GB RAM (16 GB x 2, DDR5, 4800 MHz) |
| Storage | 1 TB M.2 PCIe NVMe SSD |
| Operating System | Linux Mint 21.2 Cinnamon (based on Ubuntu 22.04) |
Test setup
The performance tests are written in Groovy (a JVM language). The tests were executed from Intelli-J using the Amazon Corretto 17 JDK.
As all CPS Core operations are synchronous, the results here are to be considered as single-threaded operation only.
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In this case, a query that matches a single device node using an absolute cps path is executed.
| Fetch descendants | Omit Descendants | Direct Descendants | All Descendants |
|---|---|---|---|
| Query | //openroadm-device[@device-id="C201-7-1A-14"] | ||
Graph |
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| Time Complexity | Linear on total number of fragments in database | Linear on total number of fragments in database | Linear on total number of fragments in database |
Query one device out of many using descendant cps path
In this case, a query that matches a single device node using a descendant cps path is executed.
| Fetch descendants | Omit Descendants | Direct Descendants | All Descendants |
|---|---|---|---|
| Query | //openroadm-device[@device-id="C201-7-1A-14"] | ||
| Graph |
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| Time Complexity | Linear on total number of fragments in database | Linear on total number of fragments in database | Linear on total number of fragments in database |
Query all devices using absolute cps path
In this case, a query that matches all device nodes using an absolute cps path is executed.
| Fetch descendants | Omit Descendants | Direct Descendants | All Descendants |
|---|---|---|---|
| Query | /openroadm-devices/openroadm-device[@status="success"] | ||
| Graph |
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| Time Complexity | Linear on the amount of fragments returned from query | Linear on the amount of fragments returned from query | Linear on the amount of fragments returned from query |
Query all devices using descendant cps path
In this case, a query that matches all device nodes using a descendant cps path is executed.
| Fetch descendants | Omit Descendants | Direct Descendants | All Descendants |
|---|---|---|---|
| Query | //openroadm-device[@ne-state="inservice"] | ||
| Graph |
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| Time Complexity | Linear on the amount of fragments returned from query | Linear on the amount of fragments returned from query | Linear on the amount of fragments returned from query |
Commentary
Suggested improvement: For absolute cps path queries, the complexity can be reduced to best-case constant time (so it is no longer linear on the total number of fragments in the database).
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