Analyze the build implementation in ${builder_path} regarding performance. Identify any bottlenecks or inefficiencies in the implementation.
Based on your analysis, speedup the build implementation in ${builder_path}.
The current build time is ${current_ingest_time_ms} ms (${config_str}).

Limit file inspection to `${builder_path}` and directly referenced headers. Do not inspect validator/compile/cache/tool internals unless the error explicitly indicates an interface mismatch. Do not use broad find, repo-wide grep, or directory scans unless the prompt names no target files. If a needed file is missing, inspect at most one directory level around the named files.

Batch all code edits. Compile only once after a coherent set of changes, or after a concrete compile error. Not after every individual edit.

Check that the build time reduces by calling the run-tool in mode "${run_tool_mode}" to get the ingest time.