* fix(streaming): make per-token inline-thinking extraction linear (#3633 follow-up)
Codex post-merge perf catch on #3633: _parseStreamState() and
syncInflightAssistantMessage() call _extractInlineThinkingFromContent on the
FULL accumulated assistantText on EVERY streamed token. The #3633 rewrite made
that a full char-by-char walk, so cost was O(n^2) over a stream — a Node harness
measured ~88s (no-tag) / ~103s (leading <think> block) for 2000x100-char tokens,
which would freeze the main thread on long reasoning-model responses.
Two fixes (Python api/streaming.py + JS static/messages.js twin, line-for-line parity):
1. Fast path: if the text contains no complete thinking opener AND (when
streaming) its tail is not a prefix of an opener, return unchanged without the
char walk — two cheap substring scans. Handles the common no-tag case.
2. Bulk-skip plain trailing content: track the next complete opener via
str.find/indexOf (_next_inline_thinking_opener / _nextThinkingOpener); once no
opener remains ahead, append the remainder and stop instead of walking it
(streaming still suppresses a trailing partial-opener prefix). Handles the
leading-block-then-long-answer case.
Result: ~88s/103s → ~0.5s/0.9s (Python), ~0.18s/0.21s (JS). All behavioral cases
(persist + streaming, code-awareness, position-aware unclosed, leading whitespace)
verified unchanged in both twins. Added a per-token streaming perf regression test
and wired _nextThinkingOpener into the node driver harness.
Co-authored-by: rodboev <rodboev@users.noreply.github.com>
* fix(streaming): perf bulk-skip must respect code context for partial-opener tails
Codex catch on the perf fix: the no-complete-opener bulk-skip suppressed a
trailing partial opener (e.g. '<thi') unconditionally during streaming, but a
partial opener INSIDE inline-backtick / fenced / indented code must stay visible
(master parity). Now, when streaming and the tail is a partial opener, fall
through to the code-aware char walk (bounded — a partial tail is a transient
single token) instead of bulk-skipping; only a PLAIN-text partial opener is
suppressed as a forming block. Added _text_tail_is_partial_opener /
_textTailIsPartialOpener (Python + JS parity) + regression tests for the
inside-code vs plain partial-tail cases.
Co-authored-by: rodboev <rodboev@users.noreply.github.com>
* docs(changelog): v0.51.336 KZ — inline-thinking streaming perf fix
---------
Co-authored-by: rodboev <rodboev@users.noreply.github.com>
Co-authored-by: Hermes Agent <hermes-agent@nesquena-hermes.local>
