Summary:
- Excel exports were awfully memory-inefficient, causing occasional docWorker
crashes. The fix is to use the "streaming writer" option of ExcelJS
https://github.com/exceljs/exceljs#streaming-xlsx-writercontents. (Empirically
on one example, max memory went down from 3G to 100M)
- It's also CPU intensive and synchronous, and can block node for tens of
seconds. The fix is to use a worker-thread. This diff uses "piscina" library
for a pool of threads.
- Additionally, adds ProcessMonitor that logs memory and cpu usage,
particularly when those change significantly.
- Also introduces request cancellation, so that a long download cancelled by
the user will cancel the work being done in the worker thread.
Test Plan:
Updated previous export tests; memory and CPU performance tested
manually by watching output of ProcessMonitor.
Difference visible in these log excerpts:
Before (total time to serve request 22 sec):
```
Telemetry processMonitor heapUsedMB=2187, heapTotalMB=2234, cpuAverage=1.13, intervalMs=17911
Telemetry processMonitor heapUsedMB=2188, heapTotalMB=2234, cpuAverage=0.66, intervalMs=5005
Telemetry processMonitor heapUsedMB=2188, heapTotalMB=2234, cpuAverage=0, intervalMs=5005
Telemetry processMonitor heapUsedMB=71, heapTotalMB=75, cpuAverage=0.13, intervalMs=5002
```
After (total time to server request 18 sec):
```
Telemetry processMonitor heapUsedMB=109, heapTotalMB=144, cpuAverage=0.5, intervalMs=5001
Telemetry processMonitor heapUsedMB=109, heapTotalMB=144, cpuAverage=1.39, intervalMs=5002
Telemetry processMonitor heapUsedMB=94, heapTotalMB=131, cpuAverage=1.13, intervalMs=5000
Telemetry processMonitor heapUsedMB=94, heapTotalMB=131, cpuAverage=1.35, intervalMs=5001
```
Note in "Before" that heapTotalMB goes up to 2GB in the first case, and "intervalMs" of 17 seconds indicates that node was unresponsive for that long. In the second case, heapTotalMB stays low, and the main thread remains responsive the whole time.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3906
Summary:
Moving bulk of nbrowser tests to core. Some tests were split and only part of them were moved.
Tests that are left are either: not suitable for grist-core (like billing) or are failing during browser tests (are not reliable).
Four fixtures directory (uploads, docs, exports-csv/excel) where completely moved to grist-core and are linked as folders.
Those changes allows to add an nbrowser test in grist-core or in the main test folder without any need to link it or link a fixture document.
Other changes:
- testrun.sh has been modified, now it runs tests from both folders (test and core/test),
- TestServer used in grist-core is now adding sample orgs and users (kiwi and others),
Test modified
- SelectionSummary: now it is run on a bigScreen, it was failing randomly
- Billing.ts: relative paths were used
- DateEditor: added waitForServer - it was failing in browser mode
- FrozenColumns, ImportFromGDrive, Printing: updated import paths
- UserManager.ts: was split into two parts (it assumed limited products)
- ViewLayoutResize.ts: this test is still in main repo, it is still failing in browser mode tests
Test Plan: Existing
Reviewers: paulfitz
Reviewed By: paulfitz
Subscribers: dsagal, paulfitz
Differential Revision: https://phab.getgrist.com/D3664
