Investigate further startup time improvements

### Problem

`pyodide_kernel` requires _many_ packages to be fully downloaded (if not already cached) and installed before giving the user the ability to do interactive computing.

### Proposed Solution

Investigate additional packages which could be avoided, either by shim or patch.

### Additional context

With jupyterlite/jupyterlite#913, we'd be down to 724 modules.

>>> import sys

>>> sorted(sys.modules)

['IPython',

 'IPython.core',

 'IPython.core.alias',

 'IPython.core.application',

 'IPython.core.async_helpers',

 'IPython.core.autocall',

 'IPython.core.builtin_trap',

 'IPython.core.compilerop',

 'IPython.core.completer',

 'IPython.core.completerlib',

 'IPython.core.crashhandler',

 'IPython.core.debugger',

 'IPython.core.display',

 'IPython.core.display_functions',

 'IPython.core.display_trap',

 'IPython.core.displayhook',

 'IPython.core.displaypub',

 'IPython.core.error',

 'IPython.core.events',

 'IPython.core.excolors',

 'IPython.core.extensions',

 'IPython.core.formatters',

 'IPython.core.getipython',

 'IPython.core.history',

 'IPython.core.hooks',

 'IPython.core.inputtransformer2',

 'IPython.core.interactiveshell',

 'IPython.core.latex_symbols',

 'IPython.core.logger',

 'IPython.core.macro',

 'IPython.core.magic',

 'IPython.core.magic_arguments',

 'IPython.core.magics',

 'IPython.core.magics.auto',

 'IPython.core.magics.basic',

 'IPython.core.magics.code',

 'IPython.core.magics.config',

 'IPython.core.magics.display',

 'IPython.core.magics.execution',

 'IPython.core.magics.extension',

 'IPython.core.magics.history',

 'IPython.core.magics.logging',

 'IPython.core.magics.namespace',

 'IPython.core.magics.osm',

 'IPython.core.magics.packaging',

 'IPython.core.magics.pylab',

 'IPython.core.magics.script',

 'IPython.core.oinspect',

 'IPython.core.page',

 'IPython.core.payload',

 'IPython.core.prefilter',

 'IPython.core.profiledir',

 'IPython.core.pylabtools',

 'IPython.core.release',

 'IPython.core.shellapp',

 'IPython.core.splitinput',

 'IPython.core.ultratb',

 'IPython.core.usage',

 'IPython.display',

 'IPython.extensions',

 'IPython.extensions.storemagic',

 'IPython.lib',

 'IPython.lib.clipboard',

 'IPython.lib.display',

 'IPython.lib.pretty',

 'IPython.paths',

 'IPython.terminal',

 'IPython.terminal.debugger',

 'IPython.terminal.embed',

 'IPython.terminal.interactiveshell',

 'IPython.terminal.ipapp',

 'IPython.terminal.magics',

 'IPython.terminal.prompts',

 'IPython.terminal.pt_inputhooks',

 'IPython.terminal.ptutils',

 'IPython.terminal.shortcuts',

 'IPython.testing',

 'IPython.testing.skipdoctest',

 'IPython.utils',

 'IPython.utils.PyColorize',

 'IPython.utils._process_common',

 'IPython.utils._process_posix',

 'IPython.utils._sysinfo',

 'IPython.utils.capture',

 'IPython.utils.colorable',

 'IPython.utils.coloransi',

 'IPython.utils.contexts',

 'IPython.utils.data',

 'IPython.utils.decorators',

 'IPython.utils.dir2',

 'IPython.utils.docs',

 'IPython.utils.encoding',

 'IPython.utils.frame',

 'IPython.utils.generics',

 'IPython.utils.importstring',

 'IPython.utils.io',

 'IPython.utils.ipstruct',

 'IPython.utils.module_paths',

 'IPython.utils.openpy',

 'IPython.utils.path',

 'IPython.utils.process',

 'IPython.utils.py3compat',

 'IPython.utils.sentinel',

 'IPython.utils.strdispatch',

 'IPython.utils.sysinfo',

 'IPython.utils.syspathcontext',

 'IPython.utils.terminal',

 'IPython.utils.text',

 'IPython.utils.timing',

 'IPython.utils.tokenutil',

 'IPython.utils.wildcard',

 '__future__',

 '__main__',

 '_abc',

 '_ast',

 '_bisect',

 '_blake2',

 '_bz2',

 '_codecs',

 '_collections',

 '_collections_abc',

 '_compat_pickle',

 '_compression',

 '_contextvars',

 '_csv',

 '_datetime',

 '_decimal',

 '_frozen_importlib',

 '_frozen_importlib_external',

 '_functools',

 '_heapq',

 '_imp',

 '_io',

 '_json',

 '_locale',

 '_lsprof',

 '_md5',

 '_operator',

 '_pickle',

 '_posixsubprocess',

 '_pyodide',

 '_pyodide._base',

 '_pyodide._core_docs',

 '_pyodide._importhook',

 '_pyodide.docstring',

 '_pyodide_core',

 '_queue',

 '_random',

 '_sha1',

 '_sha256',

 '_sha3',

 '_sha512',

 '_signal',

 '_sitebuiltins',

 '_socket',

 '_sqlite3',

 '_sre',

 '_stat',

 '_string',

 '_strptime',

 '_struct',

 '_sysconfigdata__emscripten_wasm32-emscripten',

 '_thread',

 '_warnings',

 '_weakref',

 '_weakrefset',

 'abc',

 'argparse',

 'array',

 'ast',

 'asttokens',

 'asttokens.asttokens',

 'asttokens.line_numbers',

 'asttokens.util',

 'asyncio',

 'asyncio.base_events',

 'asyncio.base_futures',

 'asyncio.base_subprocess',

 'asyncio.base_tasks',

 'asyncio.constants',

 'asyncio.coroutines',

 'asyncio.events',

 'asyncio.exceptions',

 'asyncio.format_helpers',

 'asyncio.futures',

 'asyncio.locks',

 'asyncio.log',

 'asyncio.mixins',

 'asyncio.protocols',

 'asyncio.queues',

 'asyncio.runners',

 'asyncio.selector_events',

 'asyncio.sslproto',

 'asyncio.staggered',

 'asyncio.streams',

 'asyncio.subprocess',

 'asyncio.tasks',

 'asyncio.threads',

 'asyncio.transports',

 'asyncio.trsock',

 'asyncio.unix_events',

 'atexit',

 'backcall',

 'backcall.backcall',

 'base64',

 'bdb',

 'binascii',

 'bisect',

 'builtins',

 'bz2',

 'cProfile',

 'calendar',

 'cmd',

 'code',

 'codecs',

 'codeop',

 'collections',

 'collections.abc',

 'colorsys',

 'concurrent',

 'concurrent.futures',

 'concurrent.futures._base',

 'concurrent.futures.thread',

 'contextlib',

 'contextvars',

 'copy',

 'copyreg',

 'csv',

 'dataclasses',

 'datetime',

 'decimal',

 'decorator',

 'difflib',

 'dis',

 'email',

 'email._encoded_words',

 'email._parseaddr',

 'email._policybase',

 'email.base64mime',

 'email.charset',

 'email.encoders',

 'email.errors',

 'email.feedparser',

 'email.header',

 'email.iterators',

 'email.message',

 'email.parser',

 'email.quoprimime',

 'email.utils',

 'encodings',

 'encodings.aliases',

 'encodings.cp437',

 'encodings.utf_8',

 'enum',

 'errno',

 'executing',

 'executing.executing',

 'executing.version',

 'fcntl',

 'filecmp',

 'fnmatch',

 'fractions',

 'functools',

 'gc',

 'genericpath',

 'getopt',

 'getpass',

 'gettext',

 'glob',

 'gzip',

 'hashlib',

 'heapq',

 'html',

 'html.entities',

 'http',

 'http.client',

 'importlib',

 'importlib._abc',

 'importlib._bootstrap',

 'importlib._bootstrap_external',

 'importlib.abc',

 'importlib.machinery',

 'importlib.metadata',

 'importlib.metadata._adapters',

 'importlib.metadata._collections',

 'importlib.metadata._functools',

 'importlib.metadata._itertools',

 'importlib.metadata._meta',

 'importlib.metadata._text',

 'importlib.util',

 'inspect',

 'io',

 'ipykernel',

 'ipykernel.comm',

 'ipykernel.jsonutil',

 'itertools',

 'jedi',

 'jedi._compatibility',

 'jedi.api',

 'jedi.api.classes',

 'jedi.api.completion',

 'jedi.api.completion_cache',

 'jedi.api.environment',

 'jedi.api.errors',

 'jedi.api.exceptions',

 'jedi.api.file_name',

 'jedi.api.helpers',

 'jedi.api.interpreter',

 'jedi.api.keywords',

 'jedi.api.project',

 'jedi.api.refactoring',

 'jedi.api.refactoring.extract',

 'jedi.api.strings',

 'jedi.cache',

 'jedi.common',

 'jedi.debug',

 'jedi.file_io',

 'jedi.inference',

 'jedi.inference.analysis',

 'jedi.inference.arguments',

 'jedi.inference.base_value',

 'jedi.inference.cache',

 'jedi.inference.compiled',

 'jedi.inference.compiled.access',

 'jedi.inference.compiled.getattr_static',

 'jedi.inference.compiled.mixed',

 'jedi.inference.compiled.subprocess',

 'jedi.inference.compiled.subprocess.functions',

 'jedi.inference.compiled.value',

 'jedi.inference.context',

 'jedi.inference.docstring_utils',

 'jedi.inference.docstrings',

 'jedi.inference.filters',

 'jedi.inference.flow_analysis',

 'jedi.inference.gradual',

 'jedi.inference.gradual.annotation',

 'jedi.inference.gradual.base',

 'jedi.inference.gradual.conversion',

 'jedi.inference.gradual.generics',

 'jedi.inference.gradual.stub_value',

 'jedi.inference.gradual.type_var',

 'jedi.inference.gradual.typeshed',

 'jedi.inference.gradual.typing',

 'jedi.inference.gradual.utils',

 'jedi.inference.helpers',

 'jedi.inference.imports',

 'jedi.inference.lazy_value',

 'jedi.inference.names',

 'jedi.inference.param',

 'jedi.inference.parser_cache',

 'jedi.inference.recursion',

 'jedi.inference.references',

 'jedi.inference.signature',

 'jedi.inference.syntax_tree',

 'jedi.inference.sys_path',

 'jedi.inference.utils',

 'jedi.inference.value',

 'jedi.inference.value.decorator',

 'jedi.inference.value.dynamic_arrays',

 'jedi.inference.value.function',

 'jedi.inference.value.instance',

 'jedi.inference.value.iterable',

 'jedi.inference.value.klass',

 'jedi.inference.value.module',

 'jedi.parser_utils',

 'jedi.plugins',

 'jedi.plugins.django',

 'jedi.plugins.flask',

 'jedi.plugins.pytest',

 'jedi.plugins.registry',

 'jedi.plugins.stdlib',

 'jedi.settings',

 'js',

 'json',

 'json.decoder',

 'json.encoder',

 'json.scanner',

 'keyword',

 'linecache',

 'locale',

 'logging',

 'logging.config',

 'logging.handlers',

 'marshal',

 'math',

 'micropip',

 'micropip._compat',

 'micropip._compat_in_pyodide',

 'micropip._micropip',

 'micropip.externals',

 'micropip.externals.pip',

 'micropip.externals.pip._internal',

 'micropip.externals.pip._internal.utils',

 'micropip.externals.pip._internal.utils.pkg_resources',

 'micropip.externals.pip._internal.utils.wheel',

 'micropip.externals.pip._vendor',

 'micropip.externals.pip._vendor.pkg_resources',

 'micropip.package',

 'mimetypes',

 'ntpath',

 'numbers',

 'opcode',

 'operator',

 'os',

 'os.path',

 'packaging',

 'packaging.__about__',

 'packaging._manylinux',

 'packaging._musllinux',

 'packaging._structures',

 'packaging.markers',

 'packaging.requirements',

 'packaging.specifiers',

 'packaging.tags',

 'packaging.utils',

 'packaging.version',

 'parso',

 'parso._compatibility',

 'parso.cache',

 'parso.file_io',

 'parso.grammar',

 'parso.normalizer',

 'parso.parser',

 'parso.pgen2',

 'parso.pgen2.generator',

 'parso.pgen2.grammar_parser',

 'parso.python',

 'parso.python.diff',

 'parso.python.errors',

 'parso.python.parser',

 'parso.python.pep8',

 'parso.python.prefix',

 'parso.python.token',

 'parso.python.tokenize',

 'parso.python.tree',

 'parso.tree',

 'parso.utils',

 'pathlib',

 'pdb',

 'pexpect',

 'pickle',

 'pickleshare',

 'piplite',

 'piplite.piplite',

 'pkgutil',

 'platform',

 'posix',

 'posixpath',

 'pprint',

 'profile',

 'prompt_toolkit',

 'prompt_toolkit.application',

 'prompt_toolkit.application.application',

 'prompt_toolkit.application.current',

 'prompt_toolkit.application.dummy',

 'prompt_toolkit.application.run_in_terminal',

 'prompt_toolkit.auto_suggest',

 'prompt_toolkit.buffer',

 'prompt_toolkit.cache',

 'prompt_toolkit.clipboard',

 'prompt_toolkit.clipboard.base',

 'prompt_toolkit.clipboard.in_memory',

 'prompt_toolkit.completion',

 'prompt_toolkit.completion.base',

 'prompt_toolkit.completion.deduplicate',

 'prompt_toolkit.completion.filesystem',

 'prompt_toolkit.completion.fuzzy_completer',

 'prompt_toolkit.completion.nested',

 'prompt_toolkit.completion.word_completer',

 'prompt_toolkit.cursor_shapes',

 'prompt_toolkit.data_structures',

 'prompt_toolkit.document',

 'prompt_toolkit.enums',

 'prompt_toolkit.eventloop',

 'prompt_toolkit.eventloop.async_context_manager',

 'prompt_toolkit.eventloop.async_generator',

 'prompt_toolkit.eventloop.inputhook',

 'prompt_toolkit.eventloop.utils',

 'prompt_toolkit.filters',

 'prompt_toolkit.filters.app',

 'prompt_toolkit.filters.base',

 'prompt_toolkit.filters.cli',

 'prompt_toolkit.filters.utils',

 'prompt_toolkit.formatted_text',

 'prompt_toolkit.formatted_text.ansi',

 'prompt_toolkit.formatted_text.base',

 'prompt_toolkit.formatted_text.html',

 'prompt_toolkit.formatted_text.pygments',

 'prompt_toolkit.formatted_text.utils',

 'prompt_toolkit.history',

 'prompt_toolkit.input',

 'prompt_toolkit.input.ansi_escape_sequences',

 'prompt_toolkit.input.base',

 'prompt_toolkit.input.defaults',

 'prompt_toolkit.input.typeahead',

 'prompt_toolkit.input.vt100_parser',

 'prompt_toolkit.key_binding',

 'prompt_toolkit.key_binding.bindings',

 'prompt_toolkit.key_binding.bindings.auto_suggest',

 'prompt_toolkit.key_binding.bindings.basic',

 'prompt_toolkit.key_binding.bindings.completion',

 'prompt_toolkit.key_binding.bindings.cpr',

 'prompt_toolkit.key_binding.bindings.emacs',

 'prompt_toolkit.key_binding.bindings.focus',

 'prompt_toolkit.key_binding.bindings.mouse',

 'prompt_toolkit.key_binding.bindings.named_commands',

 'prompt_toolkit.key_binding.bindings.open_in_editor',

 'prompt_toolkit.key_binding.bindings.page_navigation',

 'prompt_toolkit.key_binding.bindings.scroll',

 'prompt_toolkit.key_binding.bindings.vi',

 'prompt_toolkit.key_binding.defaults',

 'prompt_toolkit.key_binding.digraphs',

 'prompt_toolkit.key_binding.emacs_state',

 'prompt_toolkit.key_binding.key_bindings',

 'prompt_toolkit.key_binding.key_processor',

 'prompt_toolkit.key_binding.vi_state',

 'prompt_toolkit.keys',

 'prompt_toolkit.layout',

 'prompt_toolkit.layout.containers',

 'prompt_toolkit.layout.controls',

 'prompt_toolkit.layout.dimension',

 'prompt_toolkit.layout.dummy',

 'prompt_toolkit.layout.layout',

 'prompt_toolkit.layout.margins',

 'prompt_toolkit.layout.menus',

 'prompt_toolkit.layout.mouse_handlers',

 'prompt_toolkit.layout.processors',

 'prompt_toolkit.layout.screen',

 'prompt_toolkit.layout.scrollable_pane',

 'prompt_toolkit.layout.utils',

 'prompt_toolkit.lexers',

 'prompt_toolkit.lexers.base',

 'prompt_toolkit.lexers.pygments',

 'prompt_toolkit.mouse_events',

 'prompt_toolkit.output',

 'prompt_toolkit.output.base',

 'prompt_toolkit.output.color_depth',

 'prompt_toolkit.output.defaults',

 'prompt_toolkit.output.flush_stdout',

 'prompt_toolkit.output.plain_text',

 'prompt_toolkit.output.vt100',

 'prompt_toolkit.patch_stdout',

 'prompt_toolkit.renderer',

 'prompt_toolkit.search',

 'prompt_toolkit.selection',

 'prompt_toolkit.shortcuts',

 'prompt_toolkit.shortcuts.dialogs',

 'prompt_toolkit.shortcuts.progress_bar',

 'prompt_toolkit.shortcuts.progress_bar.base',

 'prompt_toolkit.shortcuts.progress_bar.formatters',

 'prompt_toolkit.shortcuts.prompt',

 'prompt_toolkit.shortcuts.utils',

 'prompt_toolkit.styles',

 'prompt_toolkit.styles.base',

 'prompt_toolkit.styles.defaults',

 'prompt_toolkit.styles.named_colors',

 'prompt_toolkit.styles.pygments',

 'prompt_toolkit.styles.style',

 'prompt_toolkit.styles.style_transformation',

 'prompt_toolkit.utils',

 'prompt_toolkit.validation',

 'prompt_toolkit.widgets',

 'prompt_toolkit.widgets.base',

 'prompt_toolkit.widgets.dialogs',

 'prompt_toolkit.widgets.menus',

 'prompt_toolkit.widgets.toolbars',

 'pstats',

 'pure_eval',

 'pure_eval.core',

 'pure_eval.my_getattr_static',

 'pure_eval.utils',

 'pure_eval.version',

 'pydoc',

 'pydoc_data',

 'pydoc_data.topics',

 'pygments',

 'pygments.console',

 'pygments.filter',

 'pygments.filters',

 'pygments.formatter',

 'pygments.formatters',

 'pygments.formatters._mapping',

 'pygments.formatters.html',

 'pygments.formatters.terminal256',

 'pygments.lexer',

 'pygments.lexers',

 'pygments.lexers._mapping',

 'pygments.lexers.python',

 'pygments.modeline',

 'pygments.plugin',

 'pygments.regexopt',

 'pygments.style',

 'pygments.styles',

 'pygments.token',

 'pygments.unistring',

 'pygments.util',

 'pyodide',

 'pyodide._core',

 'pyodide._package_loader',

 'pyodide._state',

 'pyodide.code',

 'pyodide.ffi',

 'pyodide.http',

 'pyodide.webloop',

 'pyodide_js',

 'pyodide_js._api',

 'pyolite',

 'pyolite.display',

 'pyolite.interpreter',

 'pyolite.kernel',

 'pyolite.litetransform',

 'pyolite.mocks',

 'pyolite.patches',

 'pyparsing',

 'pyparsing.actions',

 'pyparsing.common',

 'pyparsing.core',

 'pyparsing.exceptions',

 'pyparsing.helpers',

 'pyparsing.results',

 'pyparsing.testing',

 'pyparsing.unicode',

 'pyparsing.util',

 'queue',

 'quopri',

 'random',

 're',

 'reprlib',

 'resource',

 'runpy',

 'select',

 'selectors',

 'shlex',

 'shutil',

 'signal',

 'site',

 'six',

 'six.moves',

 'socket',

 'socketserver',

 'sqlite3',

 'sqlite3.dbapi2',

 'sre_compile',

 'sre_constants',

 'sre_parse',

 'stack_data',

 'stack_data.core',

 'stack_data.formatting',

 'stack_data.serializing',

 'stack_data.utils',

 'stack_data.version',

 'stat',

 'string',

 'struct',

 'subprocess',

 'sys',

 'sysconfig',

 'tarfile',

 'tempfile',

 'termios',

 'textwrap',

 'threading',

 'time',

 'timeit',

 'token',

 'tokenize',

 'tornado',

 'tornado.gen',

 'traceback',

 'traitlets',

 'traitlets._version',

 'traitlets.config',

 'traitlets.config.application',

 'traitlets.config.configurable',

 'traitlets.config.loader',

 'traitlets.traitlets',

 'traitlets.utils',

 'traitlets.utils.bunch',

 'traitlets.utils.decorators',

 'traitlets.utils.descriptions',

 'traitlets.utils.getargspec',

 'traitlets.utils.importstring',

 'traitlets.utils.nested_update',

 'traitlets.utils.sentinel',

 'traitlets.utils.text',

 'types',

 'typing',

 'typing.io',

 'typing.re',

 'unicodedata',

 'unittest',

 'unittest.case',

 'unittest.loader',

 'unittest.main',

 'unittest.mock',

 'unittest.result',

 'unittest.runner',

 'unittest.signals',

 'unittest.suite',

 'unittest.util',

 'urllib',

 'urllib.error',

 'urllib.parse',

 'urllib.request',

 'urllib.response',

 'uu',

 'uuid',

 'warnings',

 'wcwidth',

 'wcwidth.table_wide',

 'wcwidth.table_zero',

 'wcwidth.unicode_versions',

 'wcwidth.wcwidth',

 'weakref',

 'xml',

 'xml.dom',

 'xml.dom.NodeFilter',

 'xml.dom.domreg',

 'xml.dom.minicompat',

 'xml.dom.minidom',

 'xml.dom.xmlbuilder',

 'zipfile',

 'zipimport',

 'zlib']

A standout are the 97 `jedi` and `parso` packages: at present, `jedi` integration is [turned off](https://github.com/jupyterlite/jupyterlite/blame/a6e39b0335445ab6da177559b84be5ba438568ee/packages/pyolite-kernel/py/pyolite/pyolite/interpreter.py#L26), presumably as it is so slow as to appear broken. At any rate, we're still paying 1.7mb on the wire to download these two packages.

As `jedi` is [part of the pyodide standard distribution](https://github.com/pyodide/pyodide/blob/d802fb3fdc4deda6c27071935cbd10011c425b1f/packages/jedi/meta.yaml#L2) it may be rather hacky to work around it getting installed, due to issues like jupyterlite/jupyterlite#904, but may be worth it for doign 10% less work for... nothing.