Deno/deno
1
0
Fork 0
mirror of https://github.com/denoland/deno.git synced 2024-11-22 04:51:22 +00:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

manual: Edit note about V8 profiling (#2742)

Browse Source
This commit is contained in:
Bartek Iwańczuk 2019-08-07 17:31:45 +02:00 committed by Ryan Dahl
parent 43d099c027
commit 5350abbc7f
1 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
website/manual.md
View File

@ -901,8 +901,10 @@ To start profiling,
# Make sure we're only building release.
# Build deno and V8's d8.
./tools/build.py --release d8 deno
# Start the program we want to benchmark with --prof
./target/release/deno tests/http_bench.ts --allow-net --prof &
./target/release/deno tests/http_bench.ts --allow-net --v8-flags=--prof &
# Exercise it.
third_party/wrk/linux/wrk http://localhost:4500/
kill `pgrep deno`
@ -929,6 +931,18 @@ isolate-0x7fad98242400-v8.log --preprocess > prof.json
Open `third_party/v8/tools/profview/index.html` in your browser, and select
`prof.json` to view the distribution graphically.
Useful V8 flags during profiling:
- --prof
- --log-internal-timer-events
- --log-timer-events
- --track-gc
- --log-source-code
- --track-gc-object-stats
Note that you might need to run Deno with `--current-thread` flag to capture
full V8 profiling output.
To learn more about `d8` and profiling, check out the following links:
- [https://v8.dev/docs/d8](https://v8.dev/docs/d8)