add content/posts/2022-01-23-pg-trigger-tests.md

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diff --git a/content/posts/2022-01-23-pg-trigger-tests.md b/content/posts/2022-01-23-pg-trigger-tests.md
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+---
+slug: pg-trigger-tests
+title: "Postgres Trigger Tests"
+date: "2022-01-23T10:01:49-04:00"
+---
+We already know statement-level `INSERT` [triggers][tr] are faster than
+row-level [triggers][tr] in [Postgres][].
+
+Out of curiosity I decided to time row-level and statement-level
+`INSERT` triggers with a variety of row counts.
+
+Here are the results:
+
+{{< figure
+  src="/files/posts/pg-trigger-tests/results.svg"
+  class=image
+  caption="Row Count vs Query Time"
+>}}
+
+The takeaway here is that if speed is a concern, then you should prefer
+statement-level [triggers][tr] to row-level [triggers][tr].
+
+The scripts used to create the test database, run the tests, and
+generate the results are available in the [companion GitHub
+repository][repo].
+
+[docker]: https://docker.com/
+  "Docker container orchestrator."
+[ruby]: https://ruby-lang.org/
+  "Ruby programming language."
+[python]: https://python.org/
+  "Python programming language."
+[matplotlib]: https://matplotlib.org/
+  "Matplotlib plotting library."
+[tr]: https://www.postgresql.org/docs/current/sql-createtrigger.html
+  "Postgres CREATE TRIGGER statement."
+[csv]: https://en.wikipedia.org/wiki/Comma-separated_values
+  "Comma-separated values"
+[svg]: https://en.wikipedia.org/wiki/Scalable_Vector_Graphics
+  "Scalable Vector Graphics"
+[postgres]: https://www.postgresql.org/
+  "PostgreSQL relational database."
+[repo]: https://github.com/pablotron/pg-trigger-tests
+  "Companion GitHub repository."
diff --git a/static/files/posts/pg-trigger-tests/results.svg b/static/files/posts/pg-trigger-tests/results.svg
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