opensec-git/Pi-Bolt bolt-v1.0.3

Pi-Bolt 1.0.3

on GitHub

Pi-Bolt 1.0.3 is a performance release: Pi starts sooner, answers a one-shot prompt with less work, draws a streamed answer
and a long session with less CPU, wakes less while idle and keeps less memory, on new runtimes. It also fixes pi-bolt update
when GitHub's API limit is reached and extensions that await at their top level. Everything else is 1.0.2.

Changed

• Long sessions: a regular-mode frame no longer copies the whole transcript. An answer into a 4,000-entry session costs
  0.41 s CPU instead of 0.88 s on Linux x86-64 (#134).
• Streaming: a streamed chunk costs less to draw, and the spinner's steps ride on the frames the answer draws anyway, so a
  long answer draws about 19% fewer frames. A 60,000-character answer runs about 25% fewer instructions than in 1.0.2
  (#140, #147).
• Startup: less work before the first frame and the first request; pi --version and pi -p create only the functions
  they load (#136, #143).
  On macOS, Pi-Bolt binds libSystem's imports through a copy of the library beside the executable
  (#139).
• The first emoji or symbol on screen no longer builds Unicode's full emoji matcher
  (#144).
• Compiled code: includes, indexOf, slice, at and concat on a value that may be a string or an array take the
  string or array path directly (#154).
• Memory and idle:
  • On Linux, Pi's first collection comes after 16 MB, not 24.6 MB (#138).
  • pi -p and other batch runs start with a 48 MB collection allowance, so a one-shot prompt usually needs no collection
    (#146).
  • The allocator's scavenger sleeps while there is nothing to give back
    (#137), and builds without the JIT drop the idle collection two
    minutes after the last activity (#148).
• find and grep take back the 3% that 1.0.2's linear globs cost (#132).

Fixed

• pi-bolt update when GitHub's API limit is reached: the latest version is read from the releases/latest redirect, as
  the installers do, and a failed lookup says why. The startup update notice no longer uses the API either
  (#149, #150).
  1.0.2 still asks the API: if pi-bolt update on 1.0.2 says it could not determine the latest version, wait for the hourly
  limit to reset or run the installer again (below).
• Extensions that await at their top level compile again, and each extension is compiled on its own again, so several
  small extensions no longer add up to the compiler's limit
  (#142, #129,
  #152).
• The garbage collector records a completely full block it gives up as allocated
  (#145).
• The compiler and the JIT: fixes from upstream WebKit for B3/Air (two miscompiles, and the upper 32 bits of a value on
  x86-64), the JIT's tier-up while a compile is in flight, catch OSR entry and FTL tail calls. Compiled code reaches B3/Air
  in every build; in the -jit builds, a plugin whose code tiers up runs a session with about 8% fewer instructions
  (#153).

With the default settings Pi draws the same screens and sends the same requests as 1.0.2.

Numbers

1.0.2 / 1.0.3 / PiG 0.5.3. Linux on GitHub's ubuntu-24.04 and ubuntu-24.04-arm runners pinned to one CPU; the M5 in
instructions (CPU time there was noisy).

The -jit builds move the same way. With a plugin whose code tiers up (macOS, -jit), a session runs 1,742 / 1,512 M
instructions and pi -p 108 / 96 ms; that pi -p keeps about 6 MB more at its peak, as the 48 MB allowance (#146) leaves
the plugin's start-up garbage uncollected before the run ends.

Pi is 1.4.0, as in 1.0.2. The runtimes are new (engine changes in #137, #138, #139, #145, #146, #148, #153, #154).

Install

curl -fsSL https://pi-bolt.opensec.in/install.sh | sh

irm https://pi-bolt.opensec.in/install.ps1 | iex

powershell -c "irm https://pi-bolt.opensec.in/install.ps1 | iex"

or pi-bolt update, or npm install -g --allow-scripts=pi-bolt pi-bolt, or bun add -g --trust pi-bolt, or:

• Homebrew (macOS on Apple silicon, Linux): brew install opensec-git/tap/pi-bolt
• Scoop (Windows): scoop bucket add opensec-git https://github.com/opensec-git/scoop-bucket, then scoop install opensec-git/pi-bolt
• mise: github:opensec-git/Pi-Bolt with the options in the installation guide

The installer checks the release signature with OpenSSL 3, an installed Pi-Bolt, or ssh-keygen (OpenSSH 8.1 or later).
Every archive also has a GitHub build attestation: gh attestation verify <file> -R opensec-git/Pi-Bolt.

Linux x86-64 or ARM64 with glibc 2.17 or later; Android 7 or later on 64-bit ARM, in Termux; macOS 13 or later on Apple silicon;
Windows 10 1809 or later, or Windows 11, on x64.