• Home
  • Features
  • Pricing
  • Docs
  • Announcements
  • Sign In

JuliaLang / julia / 1402
75%
master: 77%

Build:
Build:
LAST BUILD BRANCH: master3
DEFAULT BRANCH: master
Ran 28 Aug 2025 06:56AM UTC
Jobs 2
Files 363
Run time 1min
Badge
Embed ▾
README BADGES
x

If you need to use a raster PNG badge, change the '.svg' to '.png' in the link

Markdown

Textile

RDoc

HTML

Rst

26 Aug 2025 10:51PM UTC coverage: 74.683%. First build
1402

Pull #475

buildkite

web-flow
System image compression with zstd (#59227)

Revived version of #48244, with a slightly different approach. This
version looks for a function pointer called `jl_image_unpack` inside
compiled system images and invokes it to get the `jl_image_buf_t`
struct. Two implementations, `jl_image_unpack_zstd` and
`jl_image_unpack_uncomp` are provided (for comparison). The zstd
compression is applied only to the heap image, and not the compiled
code, since that can be shared across Julia processes.

TODO: test a few different compression settings and enable by default.

Example data from un-trimmed juliac "hello world":
```
156M  hello-uncomp
 43M  hello-zstd
 48M  hello-zstd-1
 45M  hello-zstd-5
 43M  hello-zstd-15
 39M  hello-zstd-22

$ hyperfine -w3 ./hello-uncomp 
Benchmark 1: ./hello-uncomp
  Time (mean ± σ):      74.4 ms ±   0.8 ms    [User: 51.9 ms, System: 19.0 ms]
  Range (min … max):    73.0 ms …  76.6 ms    39 runs

$ hyperfine -w3 ./hello-zstd-1
Benchmark 1: ./hello-zstd-1
  Time (mean ± σ):     152.4 ms ±   0.5 ms    [User: 138.2 ms, System: 12.0 ms]
  Range (min … max):   151.4 ms … 153.2 ms    19 runs
 
$ hyperfine -w3 ./hello-zstd-5 
Benchmark 1: ./hello-zstd-5
  Time (mean ± σ):     154.3 ms ±   0.5 ms    [User: 139.6 ms, System: 12.4 ms]
  Range (min … max):   153.5 ms … 155.2 ms    19 runs

$ hyperfine -w3 ./hello-zstd-15
Benchmark 1: ./hello-zstd-15
  Time (mean ± σ):     135.9 ms ±   0.5 ms    [User: 121.6 ms, System: 12.0 ms]
  Range (min … max):   135.1 ms … 136.5 ms    21 runs
 
$ hyperfine -w3 ./hello-zstd-22
Benchmark 1: ./hello-zstd-22
  Time (mean ± σ):     149.0 ms ±   0.6 ms    [User: 134.7 ms, System: 12.1 ms]
  Range (min … max):   147.7 ms … 150.4 ms    19 runs
```

---------

Co-authored-by: Gabriel Baraldi <baraldigabriel@gmail.com>
Pull Request #475: Added parallel wordcount example.

63637 of 85210 relevant lines covered (74.68%)

13083235.74 hits per line

Jobs
ID Job ID Ran Files Coverage
1402 linux-coverage - 1402 28 Aug 2025 06:56AM UTC 363
74.02
1402 windows-coverage - 1402 28 Aug 2025 07:22AM UTC 319
64.02
Source Files on build 1402
  • Tree
  • List 363
  • Changed 0
  • Source Changed 0
  • Coverage Changed 0
Coverage ∆ File Lines Relevant Covered Missed Hits/Line
  • Back to Repo
  • Pull Request #475
STATUS · Troubleshooting · Open an Issue · Sales · Support · CAREERS · ENTERPRISE · START FREE · SCHEDULE DEMO
ANNOUNCEMENTS · TWITTER · TOS & SLA · Supported CI Services · What's a CI service? · Automated Testing

© 2026 Coveralls, Inc