qiskit-documentation/docs/api/qiskit-ibm-runtime/0.35/execution-span.mdx

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---
title: execution_span (v0.35)
description: API reference for qiskit_ibm_runtime.execution_span in qiskit-ibm-runtime v0.35
in_page_toc_min_heading_level: 2
python_api_type: module
python_api_name: qiskit_ibm_runtime.execution_span
---
<span id="execution-spans-qiskit-ibm-runtime-execution-span" />
<span id="module-qiskit_ibm_runtime.execution_span" />
# Execution Spans
`qiskit_ibm_runtime.execution_span`
## Overview
An [`ExecutionSpans`](execution-span-execution-spans "qiskit_ibm_runtime.execution_span.ExecutionSpans") class instance is an iterable of [`ExecutionSpan`](execution-span-execution-span "qiskit_ibm_runtime.execution_span.ExecutionSpan")s, where each iterand gives timing information about a chunk of data. Execution spans are returned as part of the metadata of a primitive job result.
## Classes
| | |
| ------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`DoubleSliceSpan`](execution-span-double-slice-span "qiskit_ibm_runtime.execution_span.DoubleSliceSpan") | An [`ExecutionSpan`](execution-span-execution-span "qiskit_ibm_runtime.execution_span.ExecutionSpan") for data stored in a sliceable format. |
| [`ExecutionSpan`](execution-span-execution-span "qiskit_ibm_runtime.execution_span.ExecutionSpan") | Abstract parent for classes that store an execution time span for a subset of job data. |
| [`ExecutionSpans`](execution-span-execution-spans "qiskit_ibm_runtime.execution_span.ExecutionSpans") | A collection of timings for pub results. |
| [`ShapeType`](execution-span-shape-type "qiskit_ibm_runtime.execution_span.ShapeType") | alias of `Tuple`\[`int`, ...] |
| [`SliceSpan`](execution-span-slice-span "qiskit_ibm_runtime.execution_span.SliceSpan") | An [`ExecutionSpan`](execution-span-execution-span "qiskit_ibm_runtime.execution_span.ExecutionSpan") for data stored in a sliceable format. |
| [`TwirledSliceSpan`](execution-span-twirled-slice-span "qiskit_ibm_runtime.execution_span.TwirledSliceSpan") | An [`ExecutionSpan`](execution-span-execution-span "qiskit_ibm_runtime.execution_span.ExecutionSpan") for data stored in a sliceable format when twirling. |