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Here’s a straightforward benchmark. Time how long it takes to run ls ( a* ) n b in a directory with a single file named a 100 , compared to running ls | grep ( a.* ) n b . Superscripts denote string repetition and parentheses are for grouping only, so that when n is 3, we’re running ls a*a*a*b in a directory…
Does this sound familar? You make a change to a library to optimize its performance or clean up technical debt or fix a bug, only to get a bug report: some very large, incomprehensibly opaque test is now failing. Or you add a new compiler optimization with a similar result. Now you have a major debugging job in an…
How do software developers understand which parts of their software are being used and whether they are performing as expected? The modern answer is telemetry , which means software sending data to answer those questions back to a collection server. This post is about why I believe telemetry is important for…
Every once in a while someone notices the first commit in the Go repo is dated 1972:
I opened GopherCon Australia in early November with the talk “Go Testing By Example”. Being the first talk, there were some A/V issues, so I re-recorded it at home and have posted it here:
People I work with recognize my computer easily: it's the one with nothing but yellow windows and blue bars on the screen. That's the text editor acme, written by Rob Pike for Plan 9 in the early 1990s. Acme focuses entirely on the idea of text as user interface. It's difficult to explain acme without seeing it…
What does it mean to add versioning to the go command? The overview post gave a preview, but the followup posts focused mainly on underlying details: the import compatibility rule , minimal version selection , and defining go modules . With those better understood, this post examines the details of how versioning…
The package version selection problem is to find a set of dependencies that can be used to build a top-level package P that is complete (all dependencies satisfied) and compatible (no two incompatible packages are selected). There may be no such set, because of the diamond dependency problem: perhaps A needs B and C…