XHProf Viewer

XHProf Viewer ingests profiling data produced by XHProf and related PHP profilers. It focuses on enabling rapid exploration of function-level costs, including inclusive vs exclusive times, call counts, and CPU usage. The tool targets developers, performance engineers, and QA teams who profile PHP applications to locate bottlenecks.
Conceptual workflow: load serialized profiling data or a snapshot export, the viewer parses the data into a call graph, resolves function identifiers, and computes aggregate metrics. It supports filtering by time window, function name, and call path, and computes inclusive times by propagating child costs to parents.
Unique value: it consolidates profiling data into a consistent dataset, enabling comparisons across runs, highlighting regressions, and informing optimization decisions. Core features include function-level summaries, a sortable top-n report, and an adjacency view of caller-callee relationships, all without requiring local tooling.
Use cases: performance regression testing, code hot-path optimization, memory and CPU budgeting, and pre-release profiling. Outputs include metrics suitable for dashboards or automation, and the tool can export JSON/CSV. It is designed for teams adopting PHP performance practices.